Material (MATERIAL): Imported PC shell EPS imported insideProduct packaging: 30.5*22.5*18CMTechnology (TECHNOLOGY): One-piece molding (In-Mold)COLOR: 13 colors are availableVentilation holes (VENTS): 16Size (SIZE): 46-53CMInner width (WIDTH): 16CM, inner length: 20CMConstruction: External IN-MOLD (integrated molding) anti-impact PC, internal EPS integrated moldingFor: children's balance bike, scooters, scooters, bicycles, skating and other outdoor sports!Specifications:1.Large 16-hole open vents improve airflow and reduce weight, and have excellent breathability2.Anchored Y-belt anchoring system provides better fit3.Helmet all-mountain helmet coverage rate is low to increase protection, multi-density impact reduction system provides excellent protection4.High-quality lining and chin padding for added comfort5.Single-drive hand plate fixing system provides easy adjustment6.Removable sun visor and an additional replacement inner pad