{"title":"Thermal Base Layers","description":"","products":[{"product_id":"sio21-stay-warm-long-sleeve-half-zip","title":"Men's Sio4 Long Sleeve Half Zip","description":"\u003c!-- VIRUS® PDP FRAMEWORK --\u003e\n\n\u003cp class=\"pdp-hook uppercase\" style=\"text-transform: uppercase;\"\u003e\n\u003cstrong\u003eMEN'S LONG SLEEVE | MAGMATIC THERMAL™ TECHNOLOGY ACCELERATES SKIN TEMPERATURE TO DOMINATE COLD-WEATHER PERFORMANCE.\u003c\/strong\u003e\n\u003c\/p\u003e\n\u003cbr\u003e\n\n\u003csection id=\"key-features\" class=\"pdp-section\" aria-label=\"Key Features\"\u003e\n\u003ch4\u003eKEY FEATURES\u003c\/h4\u003e\n\u003cul class=\"pdp-features\" role=\"list\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eMagmatic Thermal™ Fabric\u003c\/strong\u003e — Engineered with volcanic ash minerals to accelerate surface skin temperature → Sustains peak performance and warmth during intense cold-weather training.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLocksafe Zip\u003c\/strong\u003e — Features a secure quarter-zip design that eliminates zipper movement → Delivers uninterrupted focus and customizable ventilation during dynamic movements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRibbed Hem \u0026amp; Cuffs\u003c\/strong\u003e — Crafted for a precision fit at the wrists and waist → Optimizes heat retention while maintaining unrestricted mobility.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuick Dry Construction\u003c\/strong\u003e — Delivers advanced moisture-wicking properties → Maximizes thermal regulation and keeps the athlete dry during high-intensity intervals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompressive Fit\u003c\/strong\u003e — Provides a durable, second-skin feel → Maximizes muscle support and withstands the most abrasive training environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFabric Technology:\u003c\/strong\u003e Magmatic Thermal™\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e Double seam stitching • Quick dry\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFit:\u003c\/strong\u003e Compressive\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\u003cbr\u003e\n\n\u003csection id=\"technology\" class=\"pdp-section\" aria-label=\"Technology\"\u003e\n\u003ch4\u003eTECHNOLOGY\u003c\/h4\u003e\n\u003cdiv class=\"tech-grid\" role=\"list\"\u003e\n\u003carticle class=\"tech-card\" role=\"listitem\"\u003e\n\u003cp\u003e\u003cstrong\u003eMagmatic Thermal™\u003c\/strong\u003e: This revolutionary fabric delivers heat through volcanic ash minerals that actively increase and maintain surface skin temperature. Engineered to be lightweight yet durable, it ensures the athlete remains optimized for performance in freezing conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eWhat you feel:\u003c\/em\u003e Maximum warmth retention without bulk or restriction.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003cbr\u003e\n\n\u003csection id=\"model-info\" class=\"pdp-section\" aria-label=\"Model Information\"\u003e\n\u003ch4\u003eMODEL INFO\u003c\/h4\u003e\n\u003cp\u003eOn model: \u003cstrong\u003eAlex\u003c\/strong\u003e, 5'11\" (180 cm), 185 lb (84 kg), wearing \u003cstrong\u003eMedium\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003cbr\u003e\n\n\u003csection id=\"use-case\" class=\"pdp-section\" aria-label=\"Use Case\"\u003e\n\u003cp\u003eEngineered for high-output training in extreme environments. Virus® Magmatic Thermal™ technology locks in heat during outdoor intervals or early morning sessions. The compressive fit maximizes muscle support while the Locksafe Zip delivers custom ventilation without distractions. Crafted for those who refuse to let the elements dictate their training.\u003c\/p\u003e\n\u003c\/section\u003e","brand":"Virus® Performance Apparel","offers":[{"title":"S \/ Black\/Silver","offer_id":40348921692293,"sku":"SW123745-BKSL-S","price":75.0,"currency_code":"USD","in_stock":false},{"title":"S \/ USA Red\/Silver","offer_id":41105141727365,"sku":"USA","price":75.0,"currency_code":"USD","in_stock":false},{"title":"S \/ Red\/Silver","offer_id":41124536582277,"sku":"41124536582277","price":75.0,"currency_code":"USD","in_stock":false},{"title":"M \/ Black\/Silver","offer_id":40348921725061,"sku":"SW123745-BKC-M","price":75.0,"currency_code":"USD","in_stock":false},{"title":"M \/ USA Red\/Silver","offer_id":41105141760133,"sku":"USA","price":75.0,"currency_code":"USD","in_stock":true},{"title":"M \/ Red\/Silver","offer_id":41124536615045,"sku":"41124536615045","price":75.0,"currency_code":"USD","in_stock":true},{"title":"L \/ Black\/Silver","offer_id":40348921757829,"sku":"SW123745-BKC-L","price":75.0,"currency_code":"USD","in_stock":false},{"title":"L \/ USA Red\/Silver","offer_id":41105141792901,"sku":"USA","price":75.0,"currency_code":"USD","in_stock":false},{"title":"L \/ Red\/Silver","offer_id":41124536647813,"sku":"41124536647813","price":75.0,"currency_code":"USD","in_stock":false},{"title":"XL \/ Black\/Silver","offer_id":40348921790597,"sku":"SW123745-BKC-XL","price":75.0,"currency_code":"USD","in_stock":false},{"title":"XL \/ USA Red\/Silver","offer_id":41105141825669,"sku":"USA","price":75.0,"currency_code":"USD","in_stock":true},{"title":"XL \/ Red\/Silver","offer_id":41124536680581,"sku":"41124536680581","price":75.0,"currency_code":"USD","in_stock":true},{"title":"XXL \/ Black\/Silver","offer_id":40348921823365,"sku":"SW123745-BKC-XXL","price":75.0,"currency_code":"USD","in_stock":false},{"title":"XXL \/ USA Red\/Silver","offer_id":41105141858437,"sku":"USA","price":75.0,"currency_code":"USD","in_stock":true},{"title":"XXL \/ Red\/Silver","offer_id":41124536713349,"sku":"41124536713349","price":75.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0002\/0430\/8541\/files\/sio4-long-sleeve-half-zip-4874103.jpg?v=1770578598"},{"product_id":"sio21-long-sleeve-half-zip","title":"Women's Sio4 Long Sleeve Half Zip","description":"\u003cp class=\"pdp-hook uppercase\" style=\"text-transform: uppercase;\"\u003e\n\u003cstrong\u003eLONG SLEEVE HALF ZIP | MAGMATIC THERMAL TECHNOLOGY ACCELERATES SURFACE SKIN TEMPERATURE\u003c\/strong\u003e\n\u003c\/p\u003e\n\u003cbr\u003e\n\n\u003csection id=\"key-features\" class=\"pdp-section\" aria-label=\"Key Features\"\u003e\n\u003ch4\u003eKEY FEATURES\u003c\/h4\u003e\n\u003cul class=\"pdp-features\" role=\"list\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eMagmatic Thermal Fabric\u003c\/strong\u003e — Engineered with volcanic ash-infused material to maximize surface skin temperature → Delivers consistent core warmth in elite cold-weather environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLocksafe Zip\u003c\/strong\u003e — Designed with a high-performance secure zipper mechanism → Eliminates snags and ensures zero malfunctions during high-intensity training.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDouble Seam Stitching\u003c\/strong\u003e — Optimized with reinforced construction at critical stress points → Maximizes durability for the most rigorous outdoor conditioning sessions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuick Dry\u003c\/strong\u003e — High-performance moisture-wicking technology → Accelerates evaporation to keep the athlete dry and comfortable during maximum exertion.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRibbed Hem Cuff\u003c\/strong\u003e — Crafted for a structured finish at openings → Delivers an optimized fit and secures superior heat retention.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompression Fit\u003c\/strong\u003e — Engineered for a second-skin feel → Maximizes muscle support and dominates in the most abrasive environments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\u003cbr\u003e\n\n\u003csection id=\"specifications\" class=\"pdp-section\" aria-label=\"Specifications\"\u003e\n\u003ch4\u003eSPECIFICATIONS\u003c\/h4\u003e\n\u003cul class=\"pdp-specs\" role=\"list\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eFabric Technology:\u003c\/strong\u003e Magmatic Thermal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e Compression\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFit:\u003c\/strong\u003e Fitted\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\u003cbr\u003e\n\n\u003csection id=\"technology\" class=\"pdp-section\" aria-label=\"Technology\"\u003e\n\u003ch4\u003eTECHNOLOGY\u003c\/h4\u003e\n\u003cdiv class=\"tech-grid\" role=\"list\"\u003e\n\u003carticle class=\"tech-card\" role=\"listitem\"\u003e\n\u003cp\u003e\u003cstrong\u003eMagmatic Thermal\u003c\/strong\u003e: Virus® engineers volcanic ash minerals into the fiber matrix to accelerate surface skin temperature while delivering unmatched lightweight durability.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eWhat you feel:\u003c\/em\u003e Consistent warmth and comfort in cold conditions with unrestricted movement.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003cbr\u003e\n\n\u003csection id=\"model-info\" class=\"pdp-section\" aria-label=\"Model Information\"\u003e\n\u003ch4\u003eMODEL INFO\u003c\/h4\u003e\n\u003cp\u003eOn model: \u003cstrong\u003eAshley\u003c\/strong\u003e, 5'9\" (175 cm), 185 lb (84 kg), wearing \u003cstrong\u003eLarge\u003c\/strong\u003e in \u003cstrong\u003eBlack\/Silver\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003cbr\u003e\n\n\u003csection id=\"use-case\" class=\"pdp-section\" aria-label=\"Use Case\"\u003e\n\u003cp\u003eLock in warmth during your most demanding cold-weather sessions. The Virus® Sio4 Half Zip delivers volcanic ash technology to optimize temperature regulation without adding bulk. Layer it for winter conditioning or deploy it as a primary tool for outdoor training to maintain peak performance and dominate the elements.\u003c\/p\u003e\n\u003c\/section\u003e","brand":"Virus® Performance Apparel","offers":[{"title":"S \/ Black\/Silver","offer_id":41105383456901,"sku":"SW123745-BKC-S","price":75.0,"currency_code":"USD","in_stock":true},{"title":"S \/ Red\/Silver","offer_id":41105383489669,"sku":"41105141727365","price":75.0,"currency_code":"USD","in_stock":false},{"title":"M \/ Black\/Silver","offer_id":41105383522437,"sku":"SW123745-BKC-M","price":75.0,"currency_code":"USD","in_stock":false},{"title":"M \/ Red\/Silver","offer_id":41105383555205,"sku":"41105141760133","price":75.0,"currency_code":"USD","in_stock":true},{"title":"L \/ Black\/Silver","offer_id":41105383587973,"sku":"SW123745-BKC-L","price":75.0,"currency_code":"USD","in_stock":true},{"title":"L \/ Red\/Silver","offer_id":41105383620741,"sku":"41105141792901","price":75.0,"currency_code":"USD","in_stock":true},{"title":"XL \/ Black\/Silver","offer_id":41105383653509,"sku":"SW123745-BKC-XL","price":75.0,"currency_code":"USD","in_stock":true},{"title":"XL \/ Red\/Silver","offer_id":41105383686277,"sku":"41105141825669","price":75.0,"currency_code":"USD","in_stock":true},{"title":"XXL \/ Black\/Silver","offer_id":41105383719045,"sku":"SW123745-BKC-XXL","price":75.0,"currency_code":"USD","in_stock":false},{"title":"XXL \/ Red\/Silver","offer_id":41105383751813,"sku":"41105141858437","price":75.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0002\/0430\/8541\/files\/sio4-long-sleeve-half-zip-7148910.png?v=1770578480"},{"product_id":"magmatic-thermal-l-s-crew","title":"Magmatic Thermal L\/S Crew","description":"\u003c!-- VIRUS® PDP FRAMEWORK --\u003e\n\n\u003cp class=\"pdp-hook uppercase\" style=\"text-transform: uppercase;\"\u003e\n\u003cstrong\u003eTHERMAL LONG SLEEVE CREW | MAGMATIC THERMAL™ TECHNOLOGY CAPTURES AND RETAINS BODY HEAT FOR COLD-WEATHER PERFORMANCE.\u003c\/strong\u003e\n\u003c\/p\u003e\n\u003cbr\u003e\n\n\u003csection id=\"key-features\" class=\"pdp-section\" aria-label=\"Key Features\"\u003e\n\u003ch4\u003eKEY FEATURES\u003c\/h4\u003e\n\u003cul class=\"pdp-features\" role=\"list\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eMagmatic Thermal™ Fabric\u003c\/strong\u003e — Captures and retains body warmth → Optimizes core temperature during cold-weather training.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated Thumbholes\u003c\/strong\u003e — Anchor sleeves during explosive movement → Eliminates ride-up during heavy pulls, presses, or runs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuick-dry Performance\u003c\/strong\u003e — Accelerates moisture evaporation → Eliminates post-training chill during high-intensity cooldowns.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRibbed Hem \u0026amp; Cuffs\u003c\/strong\u003e — Delivers a secure, locked-in fit → Seals in warmth and facilitates seamless layering under outerwear.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDouble-seam Stitching\u003c\/strong\u003e — Reinforced construction → Maximizes durability to withstand high-volume training and daily wear.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\u003cbr\u003e\n\n\u003csection id=\"specifications\" class=\"pdp-section\" aria-label=\"Specifications\"\u003e\n\u003ch4\u003eSPECIFICATIONS\u003c\/h4\u003e\n\u003cul class=\"pdp-specs\" role=\"list\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eFabric Technology:\u003c\/strong\u003e Magmatic Thermal™\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e Double-seam stitching \/ Knit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFit:\u003c\/strong\u003e Athletic\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\u003cbr\u003e\n\n\u003csection id=\"technology\" class=\"pdp-section\" aria-label=\"Technology\"\u003e\n\u003ch4\u003eTECHNOLOGY\u003c\/h4\u003e\n\u003cdiv class=\"tech-grid\" role=\"list\"\u003e\n\u003carticle class=\"tech-card\" role=\"listitem\"\u003e\n\u003cp\u003e\u003cstrong\u003eMagmatic Thermal™\u003c\/strong\u003e: Delivers superior heat retention by harnessing your body’s natural heat to maintain dependable warmth without excessive bulk.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eWhat you feel:\u003c\/em\u003e Steady warmth, quick-dry comfort, and all-day readiness in cold environments.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003cbr\u003e\n\n\u003csection id=\"model-info\" class=\"pdp-section\" aria-label=\"Model Information\"\u003e\n\u003ch4\u003eMODEL INFO\u003c\/h4\u003e\n\u003cp\u003eOn model: \u003cstrong\u003eNico\u003c\/strong\u003e, 6'1\", 205 lbs, wearing \u003cstrong\u003eLarge\u003c\/strong\u003e in \u003cstrong\u003eBlack\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003cbr\u003e\n\n\u003csection id=\"use-case\" class=\"pdp-section\" aria-label=\"Use Case\"\u003e\n\u003cp\u003eEngineered for cold-weather dominance and outdoor training. Virus® Magmatic Thermal™ technology accelerates your path to peak operating temperature during cold starts. Whether hitting intervals or training outdoors, the quick-dry performance ensures you remain dry and focused from the first rep to the final lap.\u003c\/p\u003e\n\u003c\/section\u003e","brand":"Virus® Performance Apparel","offers":[{"title":"S \/ Black\/Silver","offer_id":41387237834885,"sku":"41387237834885","price":62.0,"currency_code":"USD","in_stock":true},{"title":"S \/ Navy\/Silver","offer_id":41387237867653,"sku":"41387237867653","price":62.0,"currency_code":"USD","in_stock":true},{"title":"S \/ Charcoal\/Silver","offer_id":41387238293637,"sku":"41387238293637","price":62.0,"currency_code":"USD","in_stock":false},{"title":"M \/ Black\/Silver","offer_id":41387237900421,"sku":"41387237900421","price":62.0,"currency_code":"USD","in_stock":true},{"title":"M \/ Navy\/Silver","offer_id":41387237933189,"sku":"41387237933189","price":62.0,"currency_code":"USD","in_stock":true},{"title":"M \/ Charcoal\/Silver","offer_id":41387238326405,"sku":"41387238326405","price":62.0,"currency_code":"USD","in_stock":true},{"title":"L \/ Black\/Silver","offer_id":41387237965957,"sku":"41387237965957","price":62.0,"currency_code":"USD","in_stock":true},{"title":"L \/ Navy\/Silver","offer_id":41387237998725,"sku":"41387237998725","price":62.0,"currency_code":"USD","in_stock":true},{"title":"L \/ Charcoal\/Silver","offer_id":41387238359173,"sku":"41387238359173","price":62.0,"currency_code":"USD","in_stock":true},{"title":"XL \/ Black\/Silver","offer_id":41387238031493,"sku":"41387238031493","price":62.0,"currency_code":"USD","in_stock":true},{"title":"XL \/ Navy\/Silver","offer_id":41387238064261,"sku":"41387238064261","price":62.0,"currency_code":"USD","in_stock":true},{"title":"XL \/ Charcoal\/Silver","offer_id":41387238391941,"sku":"41387238391941","price":62.0,"currency_code":"USD","in_stock":true},{"title":"XXL \/ Black\/Silver","offer_id":41387238097029,"sku":"41387238097029","price":62.0,"currency_code":"USD","in_stock":true},{"title":"XXL \/ Navy\/Silver","offer_id":41387238129797,"sku":"41387238129797","price":62.0,"currency_code":"USD","in_stock":true},{"title":"XXL \/ Charcoal\/Silver","offer_id":41387238424709,"sku":"41387238424709","price":62.0,"currency_code":"USD","in_stock":true},{"title":"XXXL \/ Black\/Silver","offer_id":41387245240453,"sku":"41387245240453","price":62.0,"currency_code":"USD","in_stock":false},{"title":"XXXL \/ Navy\/Silver","offer_id":41387245273221,"sku":"41387245273221","price":62.0,"currency_code":"USD","in_stock":true},{"title":"XXXL \/ Charcoal\/Silver","offer_id":41387245305989,"sku":"41387245305989","price":62.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0002\/0430\/8541\/files\/magmatic-thermal-ls-crew-7363142.jpg?v=1770578414"}],"url":"https:\/\/virusintl.com\/collections\/thermal-base-layers.oembed","provider":"VIRUS® Performance Apparel","version":"1.0","type":"link"}