The Altra Women's Lone Peak 4 Trail Running Shoes help to improve toe splay, comfort and natural foot positioning. Created with Quick-Dry Air Mesh Uppers, 5 mm Contour Footbed Insoles, Dual Layer EVA / A-Bound™ Midsoles and MaxTrac™ Rubber with TrailClaw™ Outsoles. The Lone Peak went through amazing feature upgrades for the season to bring you a more breathable, durable and secure upper along with a static webbing cinch strap at the midfoot and sandpaper textured toe caps. An additional feature is the StoneGuard™ that resembles the skeletal structure of the women's feet to bring you a better performing and flexible trail shoe. If you love the Lone Peak collection from Altra you are going to LOVE the Women's Lone Peak 4 Trail Running Shoes.