The one size Lazer Compact Helmet is all you need to get started. This compact adult bike helmet provides comfort, safety and style, in an attractive and low-priced package. Features & Benefits: Style and performance on a budget Turnfit TS plus adjustment: simply turn the dial at the rear of the helmet for a great fit In-mould construction 20 cooling vents Weight: 325g Size: Uni-size 54-61 cm Material: EPS Type : Leisure primary colour: Titanium Fit Adjustment System: Yes Protection System: Standard Rear Light: No Weight: 325g