The Boundary Shoe pushes the limits of what a neoprene boot can do; it's a touring, canoeing and portaging dream. When wading is inevitable, you'll appreciate the knee-high, waterproof 5-mm neoprene upper. Comfy 7-mm insole atop a 7-mm rubber sole provides the protection and support you've come to expect from our footwear. 2-mm plastic shim for even more protection from sharp, pointy objects. Based on our popular Paddle Shoe, this mukluk-style boot features a high-traction sole and arch strap for secure footing. Each shoe is individually tested to ensure it's waterproof.Whole sizes only Women order one size smaller. 1/2 sizes order one size larger.