Product Information Item Name: Safe Bike Children HelmetMaterial: EPS+PC Net weight: About 260gHead circumference: 48-56cm Fits for: MTB Bike/ Road Bike/ Scooter, etc.Size: One sizeRecommend Age: About 5-15 years oldFeatures:1.One-piece molding process, strong impact resistance;2.Removable lining and 13 large venting holes, for better shock absorption and sweat absorption, making riding more comfortable ;3.The long brim is designed to be integrated with the sun, with better protection;4.Free conversion between half helmet and full face helmet , with chin fixed buckle and back head protection design.4 Layer Protection----1: Outer casing PC, anti-collision and impact resistance;2: Intermediate EPS, shock absorption buffer;3: Inner layer lining, thick and soft, shock-absorbing and sweat-absorbing;4: Under the design, strengthen the plastic underlay design, protect the chinFunction: Children's riding helmet, built-in adjuster, can be adjusted to the appropriate head circumference according to different head size, suitable range (5-15 years old children's head circumference). With protective collision protection, foamed EPS can diffuse to reduce the impact of collision on the head during collision, effectively protect the head and ride protection equipment.