Specification: Inline skates: aluminum Bearings: ABEC7 Shoe: semi-soft with a ventilation system Material: Velvet Mesh EVA Wheels: PU72 mm/82A (M 35-38) PU84 mm/82A (L 39-42) PU100 mm/82A ( XL 43-45) Clasp: Two-section buckle Velcro strap Lacing Inner shoe length: 250-271 mm Maximum user weight: 100kg Remarks: Not for commercial use 24 months warranty