Catkit Men Women Lace Up Luminous LED Light Sneakers Unisex Flashing Shoes Synthetic PU NOTICE: Do Not Use "Size Chart" Link, Our size is not U.S. size. Please compare size measurement in Products Description before you buy. Closure Type: Lace-Up. Upper Material: PU. Pattern Type: Camouflage. Gender: Unisex. Heel Type:Flat with. Seven colors in one shoes. There is a button in the shoes, and you can use it to choose the color you like. The button is near the charging port, it is very easy to find. USB rechargeable. Charge time: 2~3 hours, Flashing time: 7~8 hours Do not wash, clean, if needed, can be colorless shoe polish / cleaner.