Speed past the competition in the race-day ready Altra Footwear Duo 1.5 running shoes. Balanced Cushioning places the heel and forefoot at equal distance from the ground to promote proper, low-impact form throughout the run. Fit4Her technology caters to the specific form of the female foot, which has a narrower heel and midfoot, a higher instep, a longer arch and unique metatarsal spacing. Stack Height: 31mm. Engineered-knit upper with an upgraded collar and strategic knitting for a breathable and secure fit. Lace-up closure. Minimalist tongue and collar. Breathable fabric lining. Removable 5mm Contour Footbed. MAX-LT lightweight and responsive midsole compound with ultimate cushion-to-weight ratio. FootShape toe box allows your toes to relax and spread naturally for more comfort and stability during uphill climbs and downhill descents. Vibrams MegaGrip outsole with FootPod technology maps the bones and tendons of your foot, allowing it to bend and move naturally. Imported. Measurements: Weight: 8 oz Product measurements were taken using size 9, width B - Medium. Please note that measurements may vary by size. Weight of footwear is based on a single item, not a pair.