Features1Adopting EPS raw materials and thickened PC shell with dual molds to make the helmet structure more compact and resistant to impact and vibration, protecting your head safety. 2Removable lining: Hook and loop fit, comfortable and breathable, easy to disassemble and clean, solving the problem of helmet hygiene. 3The helmet has 14 air holes to divert air resistance, reduce wind resistance, and reduce stuffiness. 4The PC shell wrap the high density EPS helmet, and the two materials seamlessly connect. 5360 degree head circumference adjustment: Rotate and adjust the tightness according to the size of the head circumference, making it easy to find the tightness that suits you.SpecificationFeatures:Adopting EPS raw materials and thickened PC shell with dual molds to make the helmet structure more compact and resistant to impact and vibration, protecting your head safety.Removable lining: Hook and loop fit, comfortable and breathable, easy to disassemble and clean, solving the problem of helmet hygiene.The helmet has 14 air holes to divert air resistance, reduce wind resistance, and reduce stuffiness.The PC shell wrap the high density EPS helmet, and the two materials seamlessly connect.360 degree head circumference adjustment: Rotate and adjust the tightness according to the size of the head circumference, making it easy to find the tightness that suits you.Specifications:Material: PC+EPSColor: White/ Black (optional)Head circumference: 58-62cmWeight: 310g/ 10.9ozPackage List:1 * HelmetPackage List1 * Helmet