Specification: Inline Skate: Aluminum Bearings: ABEC9 Shoe: semi-soft with a ventilation system Material: Velvet Mesh EVA Synthetic leather High-density foam Breathable membrane Wheels: PU70 mm/82A (S 31-34) PU76 mm/82A (M 35) -38) PU80 mm/82A (L 39-42) The inner length of the shoe (mm): 225-245 Clasp: Two-section buckle Velcro strap Lacing Brake: Impact resistant PP Remarks: Not for commercial use 24 months warranty