{"title":"Men’s Thermal Underwear \u0026 Base Layers","description":"\u003cp\u003eShop men’s thermal underwear and base layers designed for comfortable cold-weather layering. The collection includes organic cotton long johns, close-fitting Henleys and textured waffle thermals from Hemen Biarritz, Merz b. Schwanen and Pike Brothers. Choose lightweight first layers for daily wear or more substantial thermal fabrics for added warmth beneath shirts, knitwear, jeans and work trousers in the colder months.\u003c\/p\u003e","products":[{"product_id":"hemen-biarritz-harri-l-s-henley-deep-marine","title":"Hemen Biarritz Harri L\/S Henley - Deep Marine","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe Hemen Biarritz Harri L\/S Henley is a refined long-sleeve base layer with a clean, close-fitting shape. 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Finished with cotton button tape and red overstitching, it has the understated detail and everyday comfort Hemen Biarritz is known for.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey details\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eHarri L\/S Henley\u003cbr\u003eAdjusted fit\u003cbr\u003e100% GOTS-certified organic cotton\u003cbr\u003e180 g\/m² organic cotton rib jersey\u003cbr\u003eLong sleeve\u003cbr\u003eCotton button tape\u003cbr\u003eRed overstitching\u003cbr\u003ePre-washed to avoid shrinking\u003cbr\u003eMachine wash at 30°C\u003cbr\u003eTumble dry mild\u003cbr\u003eMade in Portugal\u003c\/p\u003e","brand":"Hemen Biarritz","offers":[{"title":"S","offer_id":42418242781378,"sku":"HMNP00HARHLY-GRISS","price":79.0,"currency_code":"GBP","in_stock":true},{"title":"M","offer_id":42795329716418,"sku":"HMNP00HARHLY-GRISM","price":79.0,"currency_code":"GBP","in_stock":true},{"title":"L","offer_id":42795329749186,"sku":"HMNP00HARHLY-GRISL","price":79.0,"currency_code":"GBP","in_stock":true},{"title":"XL","offer_id":42795329781954,"sku":"HMNP00HARHLY-GRISXL","price":79.0,"currency_code":"GBP","in_stock":true},{"title":"XXL","offer_id":43091235635394,"sku":"HMNP00HARHLY-GRISXXL","price":79.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2577\/9994\/products\/harri-gris-arthe-hemen-692X692-011N.jpg?v=1662723022"},{"product_id":"hemen-biarritz-harri-l-s-henley-solid-black","title":"Hemen Biarritz Harri L\/S Henley - Solid Black","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe Hemen Biarritz Harri L\/S Henley is a refined long-sleeve base layer with a clean, close-fitting shape. 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Finished with a button front and traditional fit, it’s a durable and authentic addition to any heritage-inspired wardrobe.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey details\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eModel: 1936 Waffle Shirt\u003cbr\u003eMaterial: 100% cotton (300 g\/m²)\u003cbr\u003eFabric: Heavyweight waffle knit\u003cbr\u003eClosure: Button front\u003cbr\u003eSeason: Ideal for colder weather\u003cbr\u003eMade in: Portugal\u003c\/p\u003e","brand":"Pike Brothers","offers":[{"title":"M","offer_id":57111741759869,"sku":"P0401-19-0063M","price":79.0,"currency_code":"GBP","in_stock":false},{"title":"L","offer_id":57111741792637,"sku":"P0401-19-0063L","price":79.0,"currency_code":"GBP","in_stock":false},{"title":"XL","offer_id":57111741825405,"sku":"P0401-19-0063XL","price":79.0,"currency_code":"GBP","in_stock":false},{"title":"XXL","offer_id":57454388806013,"sku":"P0401-19-0063XXL","price":79.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2577\/9994\/files\/Pike_Brothers_P0401-19-0063_1.jpg?v=1761665667"},{"product_id":"pike-brothers-1936-waffle-henley-shirt-black","title":"Pike Brothers 1936 Waffle Henley Shirt - Black","description":"\u003cp\u003eThe Pike Brothers 1936 Waffle Henley Shirt is a true cold-weather essential, designed for warmth, comfort and timeless utility. Inspired by classic thermal underwear, it works perfectly as a winter base layer or as a standalone piece through the cooler months.\u003c\/p\u003e\n\u003cp\u003eMade in Portugal from heavyweight 100% cotton waffle fabric, the 300 g\/m² knit has a textured surface that helps trap warmth while remaining comfortable against the skin. The button front gives it a traditional Henley finish, while the classic fit and substantial fabric make this \u003ca href=\"\/collections\/mens-thermal-underwear\"\u003ethermal underwear\u003c\/a\u003e a durable, authentic addition to a heritage-inspired wardrobe.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey details\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e100% cotton\u003cbr\u003e300 g\/m² fabric\u003cbr\u003eHeavyweight waffle knit\u003cbr\u003eThermal-inspired fabric\u003cbr\u003eButton front\u003cbr\u003eTraditional fit\u003cbr\u003eIdeal for colder weather\u003cbr\u003eMade in Portugal\u003c\/p\u003e","brand":"Pike Brothers","offers":[{"title":"M","offer_id":57111742677373,"sku":"P0401-20-0034M","price":79.0,"currency_code":"GBP","in_stock":false},{"title":"L","offer_id":57111742710141,"sku":"P0401-20-0034L","price":79.0,"currency_code":"GBP","in_stock":false},{"title":"XL","offer_id":57111742742909,"sku":"P0401-20-0034XL","price":79.0,"currency_code":"GBP","in_stock":true},{"title":"XXL","offer_id":57454397423997,"sku":"P0401-20-0034XXL","price":79.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2577\/9994\/files\/Pike_Brothers_P0401-20-0034_1.jpg?v=1761665619"},{"product_id":"hemen-biarritz-harri-l-s-henley-dark-forest-green","title":"Hemen Biarritz Harri L\/S Henley - Dark Forest Green","description":"\u003cp\u003eThe Hemen Biarritz Harri L\/S Henley is a refined long-sleeve base layer with a clean, close-fitting shape. Cut in an adjusted fit, it brings classic Henley styling into a soft, easy-wearing organic cotton rib jersey.\u003c\/p\u003e\n\u003cp\u003eMade in Portugal from 100% GOTS-certified organic cotton, the 180 g\/m² rib jersey is pre-washed to help avoid shrinkage. Finished with cotton button tape and red overstitching, it has the understated detail and everyday comfort Hemen Biarritz is known for.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey details\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eHarri L\/S Henley\u003cbr\u003eAdjusted fit\u003cbr\u003e100% GOTS-certified organic cotton\u003cbr\u003e180 g\/m² organic cotton rib jersey\u003cbr\u003eLong sleeve\u003cbr\u003eCotton button tape\u003cbr\u003eRed overstitching\u003cbr\u003ePre-washed to avoid shrinking\u003cbr\u003eMachine wash at 30°C\u003cbr\u003eTumble dry mild\u003cbr\u003eMade in Portugal\u003c\/p\u003e","brand":"Hemen Biarritz","offers":[{"title":"S","offer_id":57513084420477,"sku":"HMNP00HARHLY-DFGS","price":79.0,"currency_code":"GBP","in_stock":true},{"title":"M","offer_id":57513084453245,"sku":"HMNP00HARHLY-DFGM","price":79.0,"currency_code":"GBP","in_stock":true},{"title":"L","offer_id":57513084486013,"sku":"HMNP00HARHLY-DFGL","price":79.0,"currency_code":"GBP","in_stock":true},{"title":"XL","offer_id":57513084518781,"sku":"HMNP00HARHLY-DFGXL","price":79.0,"currency_code":"GBP","in_stock":true},{"title":"XXL","offer_id":57513084551549,"sku":"HMNP00HARHLY-DFGXXL","price":79.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2577\/9994\/files\/01-henley-tunisien-harri-dark-forest-green-hemen-marque-homme-men-coton-bio-sustainable.jpg?v=1766010509"},{"product_id":"pike-brothers-1927-s-s-henley-shirt-oatmeal","title":"Pike Brothers S\/S 1927 Henley Tee - Oatmeal","description":"\u003cp\u003eThe 1927 Henley Tee is a classic base layer inspired by traditional \u003ca href=\"\/collections\/mens-thermal-underwear\"\u003ethermal underwear\u003c\/a\u003e styles worn beneath work shirts in the early 20th century. Designed to be light and comfortable against the skin, it works equally well as an undershirt or as a simple single layer in warmer weather, with a clean heritage look that suits Pike Brothers’ period-focused approach.\u003c\/p\u003e\n\u003cp\u003eMade from 100% cotton, the fabric is lighter than the brand’s Utility Shirt and is not brushed on the inside, giving it a cooler, smoother feel for everyday wear. With a weight of 170g\/m², it is well suited to layering without feeling heavy, while real coconut buttons and the gently curved hem complete the shirt with understated vintage character. Made in Portugal.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey details\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"qMYqUG_convSearchResultHighlightRoot\"\u003e\n\u003cdiv class=\"\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--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\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv dir=\"auto\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling\"\u003e\n\u003cp\u003e100% cotton\u003cbr\u003e170g\/m² fabric\u003cbr\u003eLightweight cotton\u003cbr\u003eSmooth feel\u003cbr\u003eNot brushed inside\u003cbr\u003eButton front\u003cbr\u003eCoconut buttons\u003cbr\u003eGently curved hem\u003cbr\u003eBase layer design\u003cbr\u003eInspired by early 20th-century underwear\u003cbr\u003eMade in Portugal\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"mt-3 w-full empty:hidden\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Pike Brothers","offers":[{"title":"M","offer_id":57977638453629,"sku":"P0403-19-0005M","price":39.0,"currency_code":"GBP","in_stock":false},{"title":"L","offer_id":57977638486397,"sku":"P0403-19-0005L","price":39.0,"currency_code":"GBP","in_stock":false},{"title":"XL","offer_id":57977638519165,"sku":"P0403-19-0005XL","price":39.0,"currency_code":"GBP","in_stock":true},{"title":"XXL","offer_id":57977638551933,"sku":"P0403-19-0005XXL","price":39.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2577\/9994\/files\/Pike_Brothers_P0403-19-0005_1.jpg?v=1776101059"},{"product_id":"pike-brothers-1927-s-s-henley-tee-pure-white","title":"Pike Brothers S\/S 1927 Henley Tee - Pure White","description":"\u003cp\u003eThe 1927 Henley Tee is a classic \u003ca href=\"\/collections\/mens-thermal-underwear\"\u003ebase layer\u003c\/a\u003e inspired by traditional underwear styles worn beneath work shirts in the early 20th century. Designed to be light and comfortable against the skin, it works equally well as an undershirt or as a simple single layer in warmer weather, with a clean heritage look that suits Pike Brothers’ period-focused approach.\u003c\/p\u003e\n\u003cp\u003eMade from 100% cotton, the fabric is lighter than the brand’s Utility Shirt and is not brushed on the inside, giving it a cooler, smoother feel for everyday wear. With a weight of 170g\/m², it is well suited to layering without feeling heavy, while real coconut buttons and the gently curved hem complete the shirt with understated vintage character. Made in Portugal.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey details\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e100% cotton\u003cbr\u003e170g\/m² fabric\u003cbr\u003eLightweight cotton\u003cbr\u003eSmooth feel\u003cbr\u003eNot brushed inside\u003cbr\u003eButton front\u003cbr\u003eCoconut buttons\u003cbr\u003eGently curved hem\u003cbr\u003eBase layer design\u003cbr\u003eInspired by early 20th-century underwear\u003cbr\u003eMade in Portugal\u003c\/p\u003e","brand":"Pike Brothers","offers":[{"title":"M","offer_id":57978160480637,"sku":"P0403-25-0029M","price":39.0,"currency_code":"GBP","in_stock":false},{"title":"L","offer_id":57978160513405,"sku":"P0403-25-0029L","price":39.0,"currency_code":"GBP","in_stock":true},{"title":"XL","offer_id":57978160546173,"sku":"P0403-25-0029XL","price":39.0,"currency_code":"GBP","in_stock":true},{"title":"XXL","offer_id":57978160578941,"sku":"P0403-25-0029XXL","price":39.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2577\/9994\/files\/Pike_Brothers_P0403-25-0029_1.jpg?v=1776101104"},{"product_id":"merz-b-schwanen-thermal01-diamond-patterned-cotton-thermal-nature","title":"Merz b. 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Made in Portugal, it reflects the brand’s focus on comfort, quality and enduring essentials.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eKey details\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eClassic fit\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e100% organic cotton\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e365g\/qm thermal jersey\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e11oz fabric\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eDiamond-structured thermal jersey fabric\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eCrew neck\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eSleeve cuffs\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eTriangle inserts under arms\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eSwan loop label on hem\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eMade in Portugal\u003c\/span\u003e\u003c\/p\u003e","brand":"Merz b. Schwanen","offers":[{"title":"M","offer_id":58644206944637,"sku":"THERMAL01.02M","price":115.0,"currency_code":"GBP","in_stock":true},{"title":"L","offer_id":58644206977405,"sku":"THERMAL01.02L","price":115.0,"currency_code":"GBP","in_stock":true},{"title":"XL","offer_id":58644207010173,"sku":"THERMAL01.02XL","price":115.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2577\/9994\/files\/THERMAL01-02.jpg?v=1789071134"},{"product_id":"merz-b-schwanen-thermal01-diamond-patterned-cotton-thermal-deep-black","title":"Merz b. Schwanen THERMAL01 Diamond-Patterned Cotton Thermal - Deep Black","description":"\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe Merz b. Schwanen THERMAL01 Diamond-Patterned Cotton Thermal is a classic long-sleeve thermal with an authentic vintage-inspired feel. Cut in a classic fit, it can be worn on its own or layered through colder days, bringing a retro look into a modern everyday staple.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eCrafted from 365g\/qm, or 11oz, diamond-structured thermal jersey in 100% organic cotton, the fabric has been carefully recreated from a true vintage piece for timeless texture and character. A crew neck, sleeve cuffs, triangle inserts under the arms and swan loop label at the hem complete the design with thoughtful Merz b. Schwanen detail. Made in Portugal, it reflects the brand’s focus on comfort, quality and enduring essentials.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eKey details\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eClassic fit\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e100% organic cotton\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e365g\/qm thermal jersey\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e11oz fabric\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eDiamond-structured thermal jersey fabric\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eCrew neck\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eSleeve cuffs\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eTriangle inserts under arms\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eSwan loop label on hem\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eMade in Portugal\u003c\/span\u003e\u003c\/p\u003e","brand":"Merz b. Schwanen","offers":[{"title":"M","offer_id":58644214022525,"sku":"THERMAL01.99M","price":115.0,"currency_code":"GBP","in_stock":true},{"title":"L","offer_id":58644214055293,"sku":"THERMAL01.99L","price":115.0,"currency_code":"GBP","in_stock":true},{"title":"XL","offer_id":58644214088061,"sku":"THERMAL01.99XL","price":115.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2577\/9994\/files\/THERMAL01-99.jpg?v=1789072121"}],"url":"https:\/\/jeanstore.co.uk\/collections\/mens-thermal-underwear.oembed","provider":"Jeanstore","version":"1.0","type":"link"}