Sleek 2 tone design with a collapsible heel, Donny Hemp 2 Tone Slip-On Shoes by Sanuk feature a hemp-cotton blend upper, poly-wool blanket lining, and side vents for enhanced breathability. The high-rebound footbed ensures comfort that lasts all day, making them so good you’ll never want to wear anything else. Men's slip-on shoes Collapsible heel 53% recycled materials Side air holes for breathability Hemp cotton blend Soft Top footbed with antimicrobial additive Barefoot friendly wear Size Guide: Size 8 - length 10.3-10.5" Size 9 - length 10.7-10.9" Size 10 - length 11.1-11.3" Size 11 - length 11.5-11.7" Size 12 - length 11.9-12.1" Size 13 - length 12.3-12.5"