Product material: PE 30%. Polyester 40%. Velvet 10%. Elastic band 15% Others 5% Product weight: about 200g Product size: S size Suitable weight: 15kg-35kg Suitable age: 2-8 years Product features: good shell hardness, moderate thickness of the sponge, light weight, good shape retention, good breathability, pressure resistance and collision resistance, can effectively protect athletes. Applications: skateboard, roller skates, inline skates, balance bike and other outdoor activities Product includes: (6 in 1) knee pads X2, wrist pads X2, hand pads X2 Color: purple rose red/blue black/black green (three optional) Strong protection High hardness PE shell anti-collision, thickened soft sponge lining conforms to the ergonomic design of the knee and provides anti-collision protection for boys and girls' knees and elbows. Strong protection High hardness PE shell anti-collision, thickened soft sponge lining conforms to the ergonomic design of the knee and provides anti-collision protection for boys and girls' knees and elbows. Professional, soft and comfortable High-quality skin-friendly and breathable fabric makes the children's knee pads soft and smooth to the touch. Even in direct contact with the skin, your child can wear them comfortably for hours. Adjustable size to fit Adjustable shoulder straps ensure free movement during exercise, allowing your child to enjoy the sports experience freely. Suitable for boys and girls aged 2-8 years.