{"product_id":"brooks-adrenaline-gts-21-mens-running-shoe-120408-1b-894","title":"Brooks Adrenaline GTS 21 Men’s Low-Top Support Marathon Running Shoe — 120408-1B-894","description":"\u003ch2\u003eBrooks Adrenaline GTS 21 Men’s Running Shoe\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eStyle No.:\u003c\/strong\u003e 120408-1B-894\u003c\/p\u003e\u003cp\u003eThe Adrenaline GTS 21 is Brooks’ most trusted support trainer — a go-to for runners who want reliable guidance without sacrificing cushion or comfort. GTS stands for Go-To Support, and the 21st iteration delivers exactly that: a nitrogen-infused foam midsole for plush, responsive cushioning paired with GuideRails® holistic support technology that keeps excess movement in check, protecting knees and joints mile after mile. Built for marathon training and long-distance daily runs, the Adrenaline GTS 21 is the shoe that serious runners return to season after season.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpper:\u003c\/strong\u003e Engineered mesh with 3D Fit Print overlays — lightweight, breathable, and adaptive to foot shape without added bulk\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupport System:\u003c\/strong\u003e GuideRails® holistic support technology — limits excess movement at the heel and guides the foot through a natural gait cycle; protects knees by addressing biomechanical imbalances\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMidsole:\u003c\/strong\u003e Nitrogen-infused DNA LOFT foam — ultra-soft, lightweight cushioning that maintains its shape and responsiveness across high mileage\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutsole:\u003c\/strong\u003e Segmented crash pad with blown rubber forefoot — smooth heel-to-toe transitions and durable grip on road surfaces\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFit:\u003c\/strong\u003e Standard (B) width\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrop:\u003c\/strong\u003e 12mm heel-to-toe offset for a supportive, stable ride\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGender:\u003c\/strong\u003e Men’s\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStyle No.:\u003c\/strong\u003e 120408-1B-894\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003ePerformance Highlights\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eGuideRails® support — addresses overpronation holistically without rigid medial posts; keeps the whole body aligned, not just the foot\u003c\/li\u003e\n\u003cli\u003eNitrogen-infused DNA LOFT foam — lighter and more resilient than standard EVA; retains cushion integrity over hundreds of miles\u003c\/li\u003e\n\u003cli\u003eSegmented crash pad outsole — smooth, adaptive transitions from heel strike to toe-off on varied road surfaces\u003c\/li\u003e\n\u003cli\u003e3D Fit Print upper — precision-bonded overlays provide structure and support without stitched seams or added weight\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFit \u0026amp; Sizing\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eTrue to size; B width (standard)\u003c\/li\u003e\n\u003cli\u003eAvailable in US Men’s sizing — refer to the size chart for EU conversions\u003c\/li\u003e\n\u003cli\u003eRecommended for mild to moderate overpronators and neutral runners seeking extra support\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCare Instructions\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eRemove insoles and air dry after each run — avoid direct heat sources\u003c\/li\u003e\n\u003cli\u003eMachine wash on gentle cycle in a mesh laundry bag; air dry only\u003c\/li\u003e\n\u003cli\u003eClean outsole with a damp brush to maintain grip performance\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eAbout Brooks Adrenaline GTS\u003c\/h3\u003e\u003cp\u003eFor over two decades, the Adrenaline GTS has been one of the best-selling support running shoes in the world — trusted by everyday runners and marathon athletes alike. The GTS line pioneered the GuideRails® support system, moving beyond traditional motion control to offer a more natural, holistic approach to gait correction. The result is a shoe that supports without restricting — letting runners run their way, protected.\u003c\/p\u003e","brand":"Brooks","offers":[{"title":"Male \/ 40","offer_id":43455887278157,"sku":null,"price":129.0,"currency_code":"USD","in_stock":true},{"title":"Male \/ 40.5","offer_id":43455887310925,"sku":null,"price":129.0,"currency_code":"USD","in_stock":true},{"title":"Male \/ 41","offer_id":43455887343693,"sku":null,"price":129.0,"currency_code":"USD","in_stock":true},{"title":"Male \/ 42","offer_id":43455887376461,"sku":null,"price":129.0,"currency_code":"USD","in_stock":true},{"title":"Male \/ 42.5","offer_id":43455887409229,"sku":null,"price":129.0,"currency_code":"USD","in_stock":true},{"title":"Male \/ 43","offer_id":43455887441997,"sku":null,"price":129.0,"currency_code":"USD","in_stock":true},{"title":"Male \/ 44","offer_id":43455887474765,"sku":null,"price":129.0,"currency_code":"USD","in_stock":true},{"title":"Male \/ 45","offer_id":43455887507533,"sku":null,"price":129.0,"currency_code":"USD","in_stock":true},{"title":"Male \/ 46","offer_id":43455887540301,"sku":null,"price":129.0,"currency_code":"USD","in_stock":true},{"title":"Female \/ 36","offer_id":43455887573069,"sku":null,"price":129.0,"currency_code":"USD","in_stock":true},{"title":"Female \/ 36.5","offer_id":43455887605837,"sku":null,"price":129.0,"currency_code":"USD","in_stock":true},{"title":"Female \/ 37.5","offer_id":43455887638605,"sku":null,"price":129.0,"currency_code":"USD","in_stock":true},{"title":"Female \/ 38","offer_id":43455887671373,"sku":null,"price":129.0,"currency_code":"USD","in_stock":true},{"title":"Female \/ 39","offer_id":43455887704141,"sku":null,"price":129.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0703\/8586\/0685\/files\/wsxc1786323262298_2.jpg?v=1786294517","url":"https:\/\/treestwo.com\/products\/brooks-adrenaline-gts-21-mens-running-shoe-120408-1b-894","provider":"Two trees","version":"1.0","type":"link"}