The Altra Experience Flow 3 delivers a fresh upgrade with a breathable engineered mesh upper and a redesigned heel collar for a more secure, comfortable fit. Its Altra EGO P35 midsole works with rocker shape geometry to create a smooth, responsive ride that feels effortless mile after mile. With Altra's signature FootShape(TM) design, you'll enjoy natural toe splay and lasting comfort on every run. Design: Updated engineered mesh upper enhances breathability to keep feet cool and dry Redesigned heel collar improves comfort by reducing irritation and providing a secure fit Rocker shape geometry promotes a smooth and efficient stride for easier transitions Altra EGO P35 midsole delivers responsive cushioning for balanced comfort and energy return Altra's signature FootShape(TM) allows toes to splay naturally for better stability and reduced pressure Durability & Traction: Durable outsole provides reliable grip on varied surfaces for confident movement Additional Details: 4mm drop encourages a natural foot position for improved alignment and reduced strain Weight: 9oz / 255g (Size 10.5)