M-Wave Downhill bicycle helmet With this all-in-one helmet from M-Wave you have a shock-resistant bicycle helmet that is perfect for downhill and freeride mountain biking. The helmet consists of 3 separate parts that you can easily attach to each other with a screw connection. Specifications: Gender: unisex Color: black Material: ABS Type of bicycle: ATB / MTB Ventilation: 17 ventilation openings Weight: 650 grams Head circumference: 54 - 58 cm Size: M Contents: 1 Bicycle helmet 1 Visor 1 Chin guard