Mountain Cycling Helmet Color:Gradient Purple Features:Made with braided steel and

Features:Made with braided steel and waterproof material

Behind the strap size: 40CMCompatibility:Compatible with all Heybike electric bike models

Comfortable and roomy for all types of riding and commutes

Displays motor output in real time

Mountain Cycling Helmet Color:Gradient Purple Features:Made with braided steel andSuitable for most adults' head circumference. Fit for men and women. With an adjustable snug belt to adapt the built in helmet framework for a perfect fit. Use safe materials, in the case of sweating, which will not affect the skin. Solid but light, definitely can be very good protection for the head. Applicable Head Circumference: 58 61cm Material Shell: PE Material Liner: EBS