Xero Shoes Men's Amuri Cloud Non-Latex Rubber "The most comfortable, versatile sandals your feet will ever love." Enjoy Xero Shoes for walking, hiking, biking, yoga, working out, paddle boarding, water sports, jogging, running, and even 100-mile ultra marathons. 6mm non-marking, non-slip, FeelTrue sole for total natural movement, with 3mm Barefoam forefoot insert, gives you just-right protection with a whisper of comfort. The only outsole made specifically for barefoot-style sandals. Patent-pending, easy-adjust lacing holds comfortably on your foot without pressure points common in flip-flops. Lightweight and flexible enough to fit in your pocket, pack or purse. Soles have a 5,000 mile warranty. And the Amuri Cloud FLOATS! NOTE: To guarantee a correct fit, please measure your foot: 1) Place a piece of paper on the floor, against a wall; 2) Step on the paper, your heel against the wall; 3) Mark the paper in line with your longest toe; 4) Measure that length with a ruler; 5) Compare that length to the sizing chart (link, above). To REALLY ensure a correct fit, get printable templates of the exact sizes by contacting the Seller.