Suitable for long runs on the toughest terrain the merrell agility peak flex mens running shoes have a breathable upper made of mesh and thermoplastic polyurethane and feature omni fit lacing system for a precise and secure fit for running in low light conditions these 315g trail shoes offer reflective details and hyperlock technology locks the feet in place for added support during quick descents and sharp turns flexconnect technology in the midsole enhances cushioning flexibility and agi