{"product_id":"hardrock-flex-black-10-leather-work-boots-internal-metguard","title":"STC Hardrock Flex 10\" Insulated Mining Boots with METATECH System Flex Internal Metguard","description":"\u003cp dir=\"ltr\"\u003e\u003cspan\u003eCSA M Certified Insulated Internal Metguard Mining Boots with Sympatex Membrane, Nomex Thread, 200g Thinsulate, and Vibram TC4+\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cspan\u003eProduct Overview\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eUnderground mining puts water, rock, and debris above where an 8 inch boot stops. The \u003c\/span\u003e\u003cspan\u003eSTC Hardrock Flex boots\u003c\/span\u003e\u003cspan\u003e solve that with a 10 inch shaft, METATECH System Flex internal metguard (CSA M), Sympatex breathable waterproofing, and 200g Thinsulate insulation. Nomex fire-resistant thread and Cosmo Comfort Lunar quick-drying lining round it out. One of the most complete insulated internal metguard mining boots in the Nomex thread Sympatex mining boot class.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cspan\u003eQuick Product Details\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cp dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003e10\" shaft, full shin coverage\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cp dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003eMETATECH Flex internal metguard\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cp dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003eSympatex breathable waterproofing\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cp dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003e200g Thinsulate, Nomex thread\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cp dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003eVibram TC4+ outsole\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cspan\u003eKey Features and Benefits of STC Hardrock Flex Mining Boots\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cp dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003eMETATECH System Flex internal metguard: \u003c\/span\u003e\u003cspan\u003eFlexible TPU guard sits inside the boot, covering the top and sides of the foot. CSA M certified. Bends with each step instead of restricting movement. Same technology as the 8\" Metpro Flex, now paired with Sympatex, insulation, and Nomex in a 10 inch package. This is what METATECH System Flex: protection without stiffness.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cp dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003e10 inch shaft height: \u003c\/span\u003e\u003cspan\u003eTwo inches taller than standard 8 inch boots. Covers the shin where water, mud, and loose rock reach above ankle height. When comparing 10 inch vs 8 inch work boots for mining, the extra coverage matters most underground, in open pits, and during deep excavation where conditions come from above.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cp dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003eSympatex membrane + 200g Thinsulate + Nomex thread: \u003c\/span\u003e\u003cspan\u003eSympatex is a breathable waterproof barrier that lets sweat escape while blocking water and pathogens. More advanced than sealed-seam-only waterproofing (the key difference when comparing Sympatex vs H2O Seal waterproof work boots). 200g Thinsulate wraps the full foot for cold rock face and winter shifts. Nomex fire-resistant thread holds every seam together under spark and heat exposure.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cp dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003eCosmo Comfort Lunar lining: \u003c\/span\u003e\u003cspan\u003eQuick-drying, breathable, antimicrobial. Found only on the Hardrock Flex and the 14\" Granite. Dries faster than Cambrelle after wet underground shifts. One of the features that sets Cosmo Comfort Lunar lining work boots apart from the rest of the STC lineup.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cp dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003eVibram TC4+ outsole and composite toe: \u003c\/span\u003e\u003cspan\u003eDual-density natural rubber, slip and oil resistant, 90-degree heel for ladders. Composite toe and puncture-resistant plate, non-conductive. Metal eyelets and speedlaces for fast, secure lacing. Nylon shank for arch support. Padded tongue and collar.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cspan\u003eSpecifications\u003c\/span\u003e\u003c\/h2\u003e\n\u003cdiv dir=\"ltr\" align=\"left\"\u003e\n\u003ctable\u003e\n\u003ccolgroup\u003e \u003ccol width=\"208\"\u003e \u003ccol width=\"416\"\u003e \u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eHeight\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003e10\" \/ 25 cm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eUpper\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eWaterproof full-grain leather, sealed seams, Nomex thread\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eMembrane\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eSympatex (waterproof, breathable, pathogen resistant)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eLining\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eCosmo Comfort Lunar (quick-drying, breathable, antimicrobial)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eInsulation\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003e200g 3M Thinsulate (full foot wrap)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eMetatarsal Protection\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eMETATECH System Flex, internal, flexible (CSA M)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eToe Protection\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eNon-conductive composite toe\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003ePuncture Protection\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eComposite puncture-resistant plate\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eOutsole\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eDual-density Vibram TC4+ (natural rubber + PU core), slip and oil resistant\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eInsole\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eRemovable Instant Comfort (gel, PU, memory foam)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eHeel\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003e90-degree angle\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eToe Bumper\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003ePU scuff-resistant\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eTongue \u0026amp; Collar\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003ePadded for comfort\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eEyelets\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eMetal eyelets and speedlaces\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eShank\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eNylon\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eWidth\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eWide\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eSizes\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003e8 through 13\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eColor\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eBlack\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cb\u003e\u003cbr\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cspan\u003eCertifications and Standards\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cp dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003eCSA Green Triangle: \u003c\/span\u003e\u003cspan\u003eGrade 1 toe protection with puncture-resistant sole.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cp dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003eCSA ESR: \u003c\/span\u003e\u003cspan\u003eElectric shock resistant.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cp dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003eCSA M: \u003c\/span\u003e\u003cspan\u003eMetatarsal protection. The METATECH System Flex metguard meets CSA Z195 impact requirements. Among the CSA M certified 10 inch work boots in the STC mining lineup.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cspan\u003eApplications\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe STC Hardrock Flex boots are among the best 10 inch mining boots in Canada for underground and open-pit crews. As 10 inch mining boots with metatarsal protection, they cover the conditions that standard 8 inch boots leave exposed. These are insulated waterproof mining boots with internal metguard for the most demanding sites.\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cp dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003eUnderground mining\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cp dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003eOpen-pit mining and deep excavation\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cp dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003eOil and gas extraction and pipeline work\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cp dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003eHeavy industrial construction\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cp dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003eSmelting and foundry operations\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cp dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003eForestry and remote site work\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eSee the full range of \u003c\/span\u003e\u003ca href=\"https:\/\/cleanflow.net\/collections\/stc-mining-boots\"\u003e\u003cspan\u003eSTC mining boots\u003c\/span\u003e\u003c\/a\u003e\u003cspan\u003e and \u003c\/span\u003e\u003ca href=\"https:\/\/cleanflow.net\/collections\/metguard-8-inch-work-boots\"\u003e\u003cspan\u003emetguard work boots\u003c\/span\u003e\u003c\/a\u003e\u003cspan\u003e on Cleanflow to compare options by height and protection level.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cspan\u003eIndustries\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cp dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003eMining, Oil \u0026amp; Gas\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cp dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003eConstruction (heavy industrial, steel erection)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cp dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003eMetallurgy \u0026amp; Foundry\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cp dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003eForestry\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cp dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003eDistribution, Warehousing \u0026amp; Manufacturing\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cspan\u003eBuy the STC Hardrock Flex Boots Online from Cleanflow\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eCleanflow Utility Supply Company\u003c\/span\u003e\u003cspan\u003e is an authorized supplier of \u003c\/span\u003e\u003ca href=\"https:\/\/cleanflow.net\/collections\/stc\"\u003e\u003cspan\u003eSTC Footwear\u003c\/span\u003e\u003c\/a\u003e\u003cspan\u003e, stocking the full STC mining lineup from 8\" entry-level boots to the 10\" Hardrock Flex and 14\" Granite. The \u003c\/span\u003e\u003cspan\u003eSTC Hardrock Flex\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eBoot \u003c\/span\u003e\u003cspan\u003eships across Canada and the USA with returns accepted on qualifying orders. Available in sizes 8 through 13, wide width. This is STC’s flagship mining boot, and crews that need the full package of metatarsal protection, breathable waterproofing, insulation, and 10 inch coverage start here. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eCall 1-866-335-1078 (Canada) or 1-204-888-8469 (USA), or email info@cleanflow.ca for bulk pricing, net terms, and sizing questions.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003e\u003cbr\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cspan\u003eFrequently Asked Questions\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cspan\u003eWhat is the difference between the STC Hardrock Flex and the STC Metpro Flex?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eBoth use METATECH System Flex internal metguard and both are CSA M certified. The difference is everything around that guard. The Hardrock Flex is 10\" with Sympatex breathable waterproofing, 200g Thinsulate, Nomex thread, and Cosmo Comfort Lunar lining. The Metpro Flex is 8\" with H2O Seal sealed seams, Cambrelle lining, no insulation, and no Nomex. That’s the core difference when comparing Sympatex vs H2O Seal waterproof work boots in the STC mining lineup. Choose the Hardrock Flex for underground work, cold conditions, and sites that need more shaft coverage.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cspan\u003eWhy choose 10 inch mining boots over 8 inch?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eTwo extra inches of shaft covers the shin where water, mud, and loose rock reach above standard boot height. Underground mining, open-pit work, and deep excavation put hazards above the ankle that 8 inch boots leave exposed. The 10 inch height also adds support on uneven ground during long shifts. For crews deciding between 10 inch vs 8 inch work boots for mining, the extra coverage justifies the step up when conditions regularly reach above the ankle. The Hardrock Flex is one of the top 10 inch mining boots with metatarsal protection available in Canada and the USA.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cspan\u003eIs the STC Hardrock Flex waterproof?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eYes. The Hardrock Flex uses a Sympatex membrane, a waterproof and breathable barrier that blocks water while letting sweat vapor escape. It also resists pathogens. This keeps feet drier inside than sealed-seam waterproofing alone, which matters during extended underground shifts.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cspan\u003eWhat CSA certifications does the STC Hardrock Flex S29111 carry?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eCSA Green Triangle (Grade 1 toe protection with puncture-resistant sole), CSA ESR (electric shock resistant), and CSA M (metatarsal protection). This is the full certification suite for mining and heavy industrial sites in Canada. The STC Hardrock Flex boots are among the CSA M certified 10 inch work boots in the STC lineup, rated for the most demanding underground and open-pit conditions.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cspan\u003eIs the STC Hardrock Flex insulated?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eYes. 200g of 3M Thinsulate wraps the full foot. Paired with the Cosmo Comfort Lunar quick-drying lining and the Sympatex membrane, it keeps feet warm and dry on cold rock face, cold concrete, and during outdoor winter work. The Nomex fire-resistant thread adds heat resistance to the stitching. As insulated internal metguard mining boots, the Hardrock Flex covers both cold conditions and metatarsal safety in one boot.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"STC","offers":[{"title":"8 \/ Wide","offer_id":53912500470124,"sku":"S29111-11-08","price":374.99,"currency_code":"CAD","in_stock":false},{"title":"8.5 \/ Wide","offer_id":53922349252972,"sku":"S29111-11-85","price":374.99,"currency_code":"CAD","in_stock":false},{"title":"9 \/ Wide","offer_id":53912500502892,"sku":"S29111-11-09","price":374.99,"currency_code":"CAD","in_stock":false},{"title":"9.5 \/ Wide","offer_id":53922349285740,"sku":"S29111-11-95","price":374.99,"currency_code":"CAD","in_stock":false},{"title":"10 \/ Wide","offer_id":53912500535660,"sku":"S29111-11-10","price":374.99,"currency_code":"CAD","in_stock":false},{"title":"10.5 \/ Wide","offer_id":53922349318508,"sku":"S29111-11-105","price":374.99,"currency_code":"CAD","in_stock":false},{"title":"11 \/ Wide","offer_id":53912500568428,"sku":"S29111-11-11","price":374.99,"currency_code":"CAD","in_stock":false},{"title":"12 \/ Wide","offer_id":53912500601196,"sku":"S29111-11-12","price":374.99,"currency_code":"CAD","in_stock":false},{"title":"13 \/ Wide","offer_id":53912500633964,"sku":"S29111-11-13","price":374.99,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1016\/5405\/files\/hardrock_flex_black_internal_metguard_work_boots_front_outsole_view.webp?v=1781597771","url":"https:\/\/cleanflow.net\/products\/hardrock-flex-black-10-leather-work-boots-internal-metguard","provider":"Cleanflow","version":"1.0","type":"link"}