Do cool tricks on these stable roller skates with hardboot. When you go too fast, you can easily brake with the block on the front of the roller skates. They are adjustable in four sizes by a push button on the heel and have two clip closures with lock and a sturdy removable inner shoe made of polyamide with polyester. Specifications: Color: blue/black Gender: boys Size: 26-29 Material frame: aluminum Material shoe: polyester, PVC Closure: clip closure