Adjustable hook and loop closure allows for personalized comfort and fit. Dri-Lex® Lining offers superior sweat control and will keep feet dry and comfortable in wet or damp conditions. Removable molded EVA (Ethyl Vinyl Acetate) and Memory Foam footbed with Stability Cradle. Rubber Outsole with Gel Pad provides lightweight durability and impact absorption. Rubber Toplift provides traction. Seam-Sealed Waterproof Construction. 9 inch Shaft Circumference. Stability shank embedded into midsole supports the arch and helps create a smoother gait. Waterproof materials provide resistance to water absorption.