The updated Altra Torin 2.5 gives runners a zero-drop experience with enhanced cushioning along for the ride. Runners will enjoy a stable, yet lightweight feel while they take on the road or track miles. The new colorways offer a refreshing and modern twist on these unique running shoes.Upper: Quick-Dry Air mesh provides breathable flexibility. Padded tongue and heel collar enhance comfort. Flat laces reduce irritation. Lace-up front offers an adjustable fit. Improved durability offers longer-wear performance.Midsole: Zero Drop™ Platform places your heel and forefoot the same distance from the ground to promote low-impact technique. FootShape™ allows the toes to relax and spread out naturally and the big toe to remain in a straight position for more stability and a powerful toe-off. InnerFlex™ grid-like flex grooves in the midsole allow the foot to flex for more speed and better performance. A-Bound™ energy-return compound sits directly under the foot to reduce ground impact and add a spring to each step. Removable insole.Outsole: Foot Pod Outsole technology maps the bones and tendons of the foot to let it flex where it naturally wants.