Design: Midsole: Quantic™ Outsole: MaxTrac™ Cushion: Low Stack Height: 21mm Upper: Sandwich mesh vamp with durable quarter panel overlay Weight: 7.5 oz / 215 g In-Shoe Comfort: Altra’s signature FootShape™ comfort gives your feet more space to sit naturally and is designed to address biological differences in men's and women's feet Altra’s Balanced Cushioning™ platform positions your heel and forefoot at an equal distance from the ground, encouraging better alignment, better form, and a low impact landing Altra’s Quantic™ foam offers a luxurious and lightweight cushioned midsole, designed for miles and miles of comfort GaiterTrap™ hook-and-loop tab allows our strapless gaiter to easily attach to the shoe, adding protection against rocks and debris InnerFlex™ grid-like grooves in the midsole are designed to provide flexibility and movement Durability & Traction: TrailClaw™ canted lugs on the outsole are strategically placed beneath the metatarsals to provide added traction underfoot Altra’s grippy MaxTrac™ outsole provides the perfect combination of grip, traction, and durability on all types of terrain Altra Women's Superior 5 Trail Running Shoes