Rubber soleMade of high-quality materials. Fabric and leather materials:PU leather with cotton linings and holes on top for air ventilation; non-skid rubber soles. Other models?? materials: knit fabric with non-skid rubber soles. See pictures for details.On/Off Switch Instructions: Switch is hidden inside the shoes, nearby the micro-USB port. Gently press the button from outside of the shoes to turn on the light. Press the button (from outside of the shoes) to change the color and mode. Press and hold the button for 3 seconds to turn off the light.11 different light modes: Red (Steady) / Green (Steady) / Dark Blue (Steady) / Yellow (Steady) / Skyblue (Steady) / Purple (Steady) / White; Flashing light modes: White (Twinkle) / Auto-change mode / Neon-rotation mode / Rotation-twinkle mode; Lights offUSB Charging: With the micro-USB charging cable, charge your shoes the same as charging your cell phone. The LED outsole will be a flashing red light during charging. Leave the shoes on while charging. Charging time is 2-3 hours which provides 8-12 hours of lighting time.Size tips: Please refer to our size chart in the images and product description. It is recommended to get a size larger.