1. Adjustable inline skates of 4 sizes: Adjustable size, more suitable for growing children, suitable for children aged 2-8. Check our size chart to see which size fit your child's feet. 2. Comfortable and safe: With high-quality ABEC-7 silent chrome steel bearings, safe, stable and quiet to move on reinforced aluminum frame. The skates inside is soft and comfortable, breathable and durable. The outside of boot head is equipped with thick plastic pad to protect toes. 3. PVC double-shoe brakes, safe and durable, with high braking safety factor, safe for kids to play. 4. Safety double sealing layer: Includes fast tightening safety buckle system and double row auxiliary wheels to keep kids safe. 5. Enjoy leisure time: Our adjustable roller skates can let children enjoy fun of sports and help them exercise bones, joints and muscles. Specification: Gender: Unisex Applicable Age: 2-8 years old Load-bearing: up to 80kg Shell Material: High-strength PP shell Liner Material: High-quality stretchy fabric + PU material + memory foam + velvet lining Upper Material: PU+ mesh Wheel Material: High elastic PU wheel (non-luminous) Bearing: ABEC-7 Silent Chrome Steel Bearing Bracket: Reinforced and thickened one-piece bracket Packing List: 1 Pair of Roller Skates