Altra Men's Rivera Road Running Shoe Size 12 Lightly used - very good condition, see photos. From training blocks to your weekly long run, Altra Rivera running shoes are likely to be your go-to daily trainers. Every day, every run, every road—these shoes let you go with the flow. Engineered mesh uppers are lightweight, breathable and ready for the open road Altra EGO™ midsoles provide a responsive yet soft ride Neutral InnerFlex™ midsole technology increases flexibility and performance Bio heels are designed to mimic the natural form of the human heel for a smooth heel-to-toe transition FootShape™ toe boxes allow the toes to relax and spread out naturally and the big toe to remain in a straight position Balanced Cushioning™ platforms place the heels and forefeet the same distance from the ground, which encourages low-impact landings Weight: 9.1 oz / 257 g Midsole: Altra EGO™ Outsole: Neutral Innerflex™ Cushion: Moderate Stack Height: 26 mm Upper: Engineered Mesh