Altra Men's 3 Sum 1.5 Running Shoe

Turn up the heat as you leave the pack behind in the 3-Sum 1.5 racing flat from Altra Zero Dropâ„¢! Altra Zero Drop recommends that those new to natural running and zero-drop footwear transition slowly by wearing these on shorter runs and gradually building up to regular mileage. A natural running shoe with a zero-drop differential that is designed for the neutral runner looking for a barefoot-inspired feel without sacrificing cushioning. Ideal for triathlons, running, road racing and speed work. Lightweight, quick-drying air mesh upper. Asymmetrical lacing for a better fit and feel. Tongue and heel loops for quick-and-easy entry and exit. Contoured heel cup for added comfort. Seamless, sock-free design with antimicrobial lining. Removable 5 mm insole for light underfoot cushioning. Natural Ride System (NRS) features a natural shape with a zero toe-to-heel drop, and allows for a more natural ride. Dual-layer midsole is made up of EVA and A-Boundâ„¢ material. Zero Dropâ„¢ Platform promotes a more natural foot strike and a more efficient stride. Total Stack Height (total thickness of the shoe): 18 mm SpeedPodâ„¢ outsole is designed around the foot's natural contours. Blown rubber outsole material delivers lightweight grip and flexibility. Drainage ports in the heel and forefoot allows for maximum water expelling. Strobel last. Imported. Measurements: Weight: 9 oz Product measurements were taken using size 11, width D - Medium. Please note that measurements may vary by size.