Materials：The upper is made of high-quality thickened fiber material and breathable mesh, which protects your feet while being waterproof and breathable to keep your feet comfortable. Inside is a breathable, sweat-wicking Hypoli insole that keeps your feet dry during exercise. Creative:Our Roller Skate Shoes were specifically designed for all roller skating lovers. Comfortable sneakers with pop-up wheels are suitable for running, walking and skating. You don’t need multiple shoes to make the most out of life. Do out on a walk or jog, and when you are ready to skate, just lock and unlock the switch and get the wheels rolling and glide your way. Best gift:Invisible wheels for gliding anywhere, anytime, these amazing shoes are the best gift for kids，suitable for Christmas / party / dance / New Year / skating / birthday / Halloween gifts Size：Please measure your own foot length before buying, choose the correct size according to the size chart we give After-sales service: If you have any questions about the use of the product, please contact us, we will reply you within 24 hours.Safety button: The button on the heel rotates horizontally to lock the wheel and provide protection when you walk or slide.Free replacement wheels:A kit and replacement wheels are provided in the shoe box, which you can replace yourself if the wheels are damaged