Specification: Roller skate skid: aluminum Bearings: ABEC7 Boot: semi-soft with air vent system Material: Velvet Mesh EVA Synthetic leather High density foam Breathable membrane Wheels: PU76 mm/82A (M 35-38) Snap: two-section snap fastener Velcro strap Lacing Inner length of boot: 210 - 235 mm Brake: PP, impact resistance Remarks: Not for the commercial use Complies with standard PN-EN 13843:2009 24 months warranty