For warmth, protection, and flexibility, the NRS Kinetic Water Shoes fit well into tight kayaks or allow you to feel more in touch with your SUP. . Upper and insole constructed with 3 mm Terraprene neoprene with titanium to keep your feet warm from heel to toe. Nonmarking 1.5 mm textured rubber sole won't add bulk, and still protects your feet both in and out of the boat. Stretchy rubber bands improve lateral stability and help hold shoe to your foot. Armor patches guard the upper from abrasion and add even more protection for your foot. Naturally shaped toe box provides a roomy, nonbinding fit. Shoe top draw cord keeps your foot snug and secure. 2 mm plastic shim. Whole sizes only. 12 sizes order one size larger.