A nifty Drifter feature allows the back to collapse, converting it to a slip-on. The upper is made from cotton canvas and microfiber which keeps this shoe 100% vegan. Upper: Cotton canvas + microfiber Lining: Polyester + breathable air mesh Outsole: 9.0mm Air-injection rubber 100% vegan Footbed: 0.8mm cork top layer with 3.0mm PU under layer Stack Height: 10.0mm not including 3.0mm insole Width: Lems Wide Drop: 0.0mm Weight: 6oz (Men's 10) Consider ordering a half-size up