{"title":"Flame Resistant Base Layers","description":"\u003carticle class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" tabindex=\"-1\" data-turn-id=\"request-WEB:49fc3faa-4e90-46be-bdaa-70009db64720-57\" data-testid=\"conversation-turn-116\" data-scroll-anchor=\"true\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:--spacing(4)] thread-sm:[--thread-content-margin:--spacing(6)] thread-lg:[--thread-content-margin:--spacing(16)] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] thread-lg:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\" tabindex=\"-1\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col grow\"\u003e\n\u003cdiv class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal [.text-message+\u0026amp;]:mt-1\" dir=\"auto\" data-message-author-role=\"assistant\" data-message-id=\"c5bb1fc4-3c72-4adf-af8f-d8ecd3b6a34a\" data-message-model-slug=\"gpt-5-1\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden first:pt-[1px]\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert w-full break-words light markdown-new-styling\"\u003e\n\u003ch2\u003eFlame Resistant Base Layers for Comfort and Certified Protection\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003eFlame Resistant Base Layers provide an essential first layer of protection for professionals working in hazardous environments. Designed to be worn beneath protective workwear, these garments help regulate body temperature while offering certified resistance to heat and flame, making them ideal for demanding industrial applications.\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003eOur collection includes FR thermal tops, long-sleeve base layers, leggings and thermal underwear suitable for utilities, oil and gas, welding, electrical engineering and manufacturing. Made from soft, breathable fabrics, these garments deliver all-day comfort while helping workers stay warm in colder conditions without compromising safety.\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003eWhether worn as part of a layered clothing system or beneath flame resistant outerwear, these base layers provide dependable performance throughout the working day.\u003c\/p\u003e\n\u003ch2\u003eDesigned for Layering and Everyday Comfort\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003eA quality base layer should offer warmth and moisture management while remaining lightweight and comfortable beneath protective clothing.\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003eFeatures commonly found across our range include:\u003c\/p\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003ePermanently flame resistant fabrics\u003c\/li\u003e\n\u003cli\u003eSoft, breathable materials\u003c\/li\u003e\n\u003cli\u003eMoisture-wicking properties to help keep skin dry\u003c\/li\u003e\n\u003cli\u003eLightweight thermal insulation\u003c\/li\u003e\n\u003cli\u003eComfortable stretch fit for unrestricted movement\u003c\/li\u003e\n\u003cli\u003eFlat seams to reduce irritation\u003c\/li\u003e\n\u003cli\u003eSuitable for year-round wear\u003c\/li\u003e\n\u003cli\u003eCertified to recognised flame resistant safety standards\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003eThese features help improve comfort while supporting workplace safety in challenging environments.\u003c\/p\u003e\n\u003ch2\u003eEssential Protection for Hazardous Industries\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003eFlame resistant base layers are commonly worn by professionals exposed to heat, flash fire and arc flash risks. As the first layer of an FR clothing system, they provide additional protection while helping to regulate body temperature during physically demanding work.\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003eSuitable for both indoor and outdoor environments, these garments are ideal for workers who require dependable protection throughout changing weather conditions.\u003c\/p\u003e\n\u003ch2\u003eSuitable Industries\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003eOur flame resistant base layers are ideal for professionals working in:\u003c\/p\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003eOil and gas\u003c\/li\u003e\n\u003cli\u003eUtilities\u003c\/li\u003e\n\u003cli\u003eElectrical engineering\u003c\/li\u003e\n\u003cli\u003eWelding and fabrication\u003c\/li\u003e\n\u003cli\u003eManufacturing\u003c\/li\u003e\n\u003cli\u003ePetrochemical industries\u003c\/li\u003e\n\u003cli\u003eEnergy generation\u003c\/li\u003e\n\u003cli\u003eRail\u003c\/li\u003e\n\u003cli\u003eHeavy engineering\u003c\/li\u003e\n\u003cli\u003eIndustrial maintenance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhy Choose Flame Resistant Base Layers?\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003eOur flame resistant base layers combine certified protection with exceptional comfort, making them an essential part of any protective clothing system. Designed to provide warmth, breathability and freedom of movement, they help professionals stay comfortable without compromising workplace safety.\u003c\/p\u003e\n\u003cp\u003eWhether you're building a complete FR clothing system or replacing everyday thermal workwear, our collection includes high-quality flame resistant base layers from trusted brands designed for reliable performance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"z-0 flex min-h-[46px] justify-start\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/article\u003e","products":[{"product_id":"fr14","title":"Modaflame Knit FR Leggings","description":"\u003cp class=\"text-justify\"\u003eDesigned for cooler conditions to keep the wearer warm, comfortable and safe. Elasticated waistband allows freedom of movement and the ribbed hem cuffs help trap in heat.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3 class=\"text-left\"\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eInherent flame resistant qualities will not diminish with washing\u003c\/li\u003e\n\u003cli\u003eProtection against radiant, convective and contact heat\u003c\/li\u003e\n\u003cli\u003eFlame resistant ribbed cuff for added safety\u003c\/li\u003e\n\u003cli\u003eHigh cotton content for superior comfort\u003c\/li\u003e\n\u003cli\u003eOutstanding colour fastness and shrinkage results\u003c\/li\u003e\n\u003cli\u003eFully elasticated waistband for ultimate wearer comfort\u003c\/li\u003e\n\u003cli\u003e40+ UPF rated fabric to block 98% of UV rays\u003c\/li\u003e\n\u003cli\u003eCE-CAT III\u003c\/li\u003e\n\u003cli\u003eCE certified\u003c\/li\u003e\n\u003cli\u003eSuitable to be worn in an ATEX environment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"std_titles\"\u003e\u003cstrong\u003eShell Fabric :\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003eModaflame Knit: 60% Modacrylic, 39% Cotton, 1% Carbon Fibre 200g\u003c\/div\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003ch3 class=\"text-left\"\u003eStandards\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEN ISO 11612 A1, B1, C1, F1\u003c\/li\u003e\n\u003cli\u003eEN 1149 -5\u003c\/li\u003e\n\u003cli\u003eIEC 61482-2 IEC 61482-1-1 ELIM 4.4 CAL\/CM², EBT 5.5 CAL\/CM²\u003c\/li\u003e\n\u003cli\u003eIEC 61482-2 IEC 61482-1-2 APC 1\u003c\/li\u003e\n\u003cli\u003eASTM F1959\/F1959M-12 EBT = 4.3 CAL\/CM\u003csup\u003e2\u003c\/sup\u003e\u003cspan\u003e \u003c\/span\u003e(HAF = 66%)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Portwest","offers":[{"title":"Navy \/ S","offer_id":52397869007181,"sku":"FR14NARS","price":31.67,"currency_code":"GBP","in_stock":true},{"title":"Navy \/ M","offer_id":52397868974413,"sku":"FR14NARM","price":31.67,"currency_code":"GBP","in_stock":true},{"title":"Navy \/ L","offer_id":52397868941645,"sku":"FR14NARL","price":31.67,"currency_code":"GBP","in_stock":true},{"title":"Navy \/ XL","offer_id":52397869039949,"sku":"FR14NARXL","price":31.67,"currency_code":"GBP","in_stock":true},{"title":"Navy \/ XXL","offer_id":52397869072717,"sku":"FR14NARXXL","price":31.67,"currency_code":"GBP","in_stock":true},{"title":"Navy \/ XXXL","offer_id":52397869105485,"sku":"FR14NARXXXL","price":31.67,"currency_code":"GBP","in_stock":true},{"title":"Navy \/ 4XL","offer_id":52397868908877,"sku":"FR14NAR4XL","price":31.67,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0894\/0424\/4301\/files\/FR14NAR_7adf6b22-d9a6-4b49-a20f-5f287557051c.jpg?v=1757597197"}],"url":"https:\/\/hivistrousers.co.uk\/collections\/flame-resistant-base-layers.oembed","provider":"Hi-Vis Trousers","version":"1.0","type":"link"}