1、1. 7-in-1 child protection equipment set: children's bicycle helmet protection equipment, providing perfect protection for boys and girls, including 1 X helmet, 2 X elbow pad, 2 X wrist pad, 2 X knee pads. 2、2. Adjustable children's helmet: a helmet designed for children aged 4-8. Children's helmet head circumference is 53-55cm/ 20.9"-21.7", boys and girls can easily adjust the skateboard helmet to fit their size. 3、3. safe and impact resistant: The skateboard helmet adopts an ABS outer shell and high-density EPS inner shell, and a thick soft sponge, which helps to absorb and protect the head during impact. Children's knee pads and elbow pads are made of high-hardness PVC shell, durable and tough material, breathable inner liner, overall safety protection, long-term use. 4、4. Wide applications: Our children's helmets are suitable for scooters, skateboards, biking, roller skating, horse riding, skating, and other outdoor sports. This is the perfect gift for children's birthdays, Thanksgiving and Christmas. All-round protection makes your child more confident in practice. 5、5. Packing content: 2* elbow pads, 2* knee pads, 2* wrist pads, 1* helmet, 7-piece set, which provides all-around perfect protection for your children. Material: ABS+EPS Helmet size: 28*20*15CM/11" 7.9" *5.9" Suggested head circumference: 53-55cm/ 20.9"-21.7" Suggested age: 4-8 years old Suitable occasions: suitable for scooters, skateboards, roller skating, biking, horse riding, skating, and other outdoor sports. 1*Helmet; 2*Knee Pads; 2*Elbow Pads; 2*Wrist Guard;