Rubber sole 30-Days-Quality-Gurantee-No-Return-Needed SIZE TIPS: Unisex.Please refer to your foot length and choose size following the size chart in the product description for Women,Men,Kids. SWITCH INSTRUCTION: Hidden switch button, 1 beside the usb outlet, along the inside hem. Push around and you’ll find the click. Press it to switch on.It starts with steady red light.With each press,it changes to another light mode.Press the switch for 11 times to turn the light off. CHARGE INSTRUCTION: Easy charge like your cell phone with the attached USB charging cable.Switch on the shoes when received and light up until all power gone.Then charge both shoes for 3 hours. LIGHT MODES:1.light on from red(steady)-2.green(st’)-3.blue(st’)-4.yellow(st’)-5.skyblue(st’)-6.purple(st’)-7.white(st’)-8.auto-change mode-9.light off.