New Balance Women's St4040r1 100% Synthetic-Mesh Toe Protect rubber compound provides reinforcement and protects against the elements. Innovative REVlite midsole provides premium responsiveness and durability at a 30% lighter weight than other foams with comparable performance. Lightweight cushioned midsole. PROBANK technology, on the lateral side of the foot's foward half, distributes force more evenly so you can change directions quickly and efficiently. Cutting movements can cause the foot to slide to the outside, or lateral edge of the shoe, and this tech Nubby outsole.