These shoes have a synthetic leather and mesh upper for breathability and quick drying as well as an elastic cord and lock system for lacing a secure fit. They also have a Kinetic Fit™ BASE removable contoured insole for flexible support. The Merrell Air Cushion in the heel is designed for shock absorption and stability. Suitable for hiking, wading in streams, paddling, and general warm-weather wear, these Merrells are breathable and quick-drying.