The Hydro Run Sneaker from Merrell is perfect for outdoor adventures. A toggle closure provides adjustability and an easy on and off. The flexible outsole features M-Select GRIP technology that offers supreme durability and traction. Toe and heel overlays provide protection and durability, while an M-Select FRESH lining shuts out odor before it starts. Toggle closure M-Select GRIP technology Toe and heel overlays M-Select FRESH lining.