Feature:Highly Impact Resistance -Scooter helmet use PVC outer shell + high-density soft EVA inner shell (The Soft Lining can be air-dried or removed to clean), thickened soft sponge offer great coverage, keep your child safe from bumps and bruises when your kids biking, cycling, skating, scooting or skateboarding.Adjustable Toddler Helmet--Adjustable straps designed for kids ages 3 to 10, weight: 15kg-40kg. Helmet head circumference: 52-56 cm/20.47- 22.04 inch. Please according to head circumference and child's weight and age choose. Note: Measure the circumference slightly above eye brows to ensure you choose the correct size.Breathable Material-- 6 breathable vents allows airflow and keep head cool. Special multiple vents design and breathable foam, the helmets and pads help kids feel cool and comfortable even during intense body movement.Adjustable Straps-- The knee and elbow pads for kids 3-10 years old come with elasticated rip-tabs making it easy to adjust the size and hold its tightly to keep their position right. This will effectively reduce the potential safety hazard caused by accidental falls.All Around Protection for Kids-- 7 in 1 kids bike helmet set - Kids bike helmet, 2 knee pads, 2 elbow pads and 2 wrist pads will ensure your kids are in all-round protection while cycling, skating, etc. Specification:Material: Mesh + Sponge + PVCColor: pink, red, yellow, blueSize: Helmet-26*20*13cm, head circumference: 52-56 cm/20.47- 22.04 inch.includes:1 x Kids bike helmet2 x knee pads2 x elbow pads 2 x wrist guards