Amphibious water shoes from the world's premier barefoot shoe producer. Flexible, zero-drop, minimalist, with excellent barefoot feel, and a strong, puncture-resistant foot bed. These are made from a proprietary EVA that incorporates 10% renewable algae. Very roomy in the toebox, so your tootsies can spread out and grip the earth. Drains well, absorbs zero water, and dries almost instantly. Wear bearfoot, with a normal sock, or with a neoprene bootie for cold-weather water activites. Official size is EUR 41, but these are roomy and will reasonably fit anywhere from a US M8 - M9.