Specification: Frame: Aluminum, One-piece CNC, 3.4mm Shell material: PP, glass fiber reinforced and nylon Bearings: ABEC9 Shoe: semi-soft with a ventilation system thermoformable breathable membrane velvet material EVA material MESH synthetic leather profiled insert Insole length ( mm): 270 Wheels: PU110mm/82 A Clasp: Buckle Velcro strap Lacing Remarks: Not for commercial use 24 months warranty