Synthetic upper with padded tongue and collar for optimal comfort and protection. Embossed Heelys logo on the side. ABEC 5 bearings. Translucent outsole featuring bright LED’s around the perimeter. Power button located on tongue. Easily press the power button to scroll through the 12 different light sequences. Light sequence will flash for 4 minutes, then turn off automatically. LED lights are rechargeable. When lights start to appear dim, it’s time to recharge. Dual prong charger included in package so both shoes can be charged at the same time! Locate the charging port under the hidden flap on the tongue & connect the micro USB to a universal USB port. Plug charger not included. Allow 3 hours for full charge.