The new Brooks Men’s Adrenaline GTS 21 features extended DNA LOFT plus GuideRails® support — a surefire recipe for comfort that’s custom made for your stride.SpecsSUPPORTSupportMIDSOLE DROP12mmWEIGHT10.4oz / 294.8gARCHMedium, HighEXPERIENCE TYPECushionTECHNOLOGY3D Fit Print, GuideRails, Segmented Crash Pad, DNA LOFTUSERoad RunningWhat’s New DNA LOFT cushioning now extends throughout the midsole for an even smoother transition from heel to toe. Smooth transitionDNA LOFT goes beyond the heel, all the way to the forefoot, for a buttery smooth stride.GuideRails® holistic support systemWe’ve shifted our focus beyond the feet to the most injury-prone part of a runner’s body: the knees. GuideRails® support keeps you moving comfortably by keeping excess movement in check.Soft, secure fitThe new Engineered Air Mesh upper hugs the foot for a secure fit while also improving breathability.Stretch & structureThe 3D Fit Print applies strategic stretch and structure to the upper Brooks Men’s Adrenaline GTS 21 Grey