The Reefer Boot Is A Warm Water/Tropical Boot That You Can Wear Surfing But Wont Over Heat Your Feet. A Durable Outsole And Neoprene/Mesh Upper Provides Durability, Protection, And Comfort.Features:8211; Mesh Water Flow Panels8211; Compression Strap8211; Barrel Lock Closure8211; Reef Protective Sole And Pull On Heel Strap, 1.5mm Split ToeSpecifications:8211; Thickness: 1.5mm