NRS Boundary Neoprene Kayak Shoes - The Boundary Shoes push the limits of what a neoprene boot can do: it's a touring, canoeing and portaging dream. They are knee high, waterproof and warm. These mukluk-style boots features a high-traction sole and arch strap for secure footing. When wading is inevitable, you'll appreciate the knee-high, waterproof 5 mm neoprene upper. A comfy 7 mm insole atop a 7 mm rubber sole provides the protection and support you've come to expect from NRS footwear. The 2 mm plastic shim provides even more protection from sharp, pointy objects. Each shoe is individually tested to ensure it's waterproof. Sizing:The Boundary comes in whole, unisex sizes. We recommend people with half-sized feet order the next full size up. For women order one size smaller. However if your feet run wide, consider choosing your usual shoe size.