Sport Protections for Kids 1. Material: Nylon/Cloth/Sponge 2. Easy, ... lighten 1KG, the lightest stilts in the world, wear more comfortable, jump more easiness.3) Design more ... sponge, make it easy, safe and comfortable to wear. Arc stents could protect spring and make resilience ... test every spare parts, our hardness of aluminium, wear resistance of rubber, resolution of metal appearance all ...