Durable Impact Resistance MaterialThis bicycle helment is specially designed for adult Youth rider. With tough and durable PVC PC, EPS foam, it helps absorb the impact and protect the head during crash. All-Round Breathable LightweightWith 18 vents ventilation design, the bike helmet allows air go through and keeps cool. The breathable lightweight material wears comfortably. Adjustable Head Cirumference Quick Release Buckle bike helmets for adults can be applied to different head sizes. Both the head cirumference and side straps are adjustable. This cycling helmet fits head circumferences 22.83-24.41 inch (58- 62 cm) for both men and women. The quick-release buckle makes it much easier to put on or take off your helmet. Detachable Sun Visor LinerWith detachable sun visor, it can protect your eyes from sun, rain, mud. You can remove it when you don't need it. The inner padding can absorb sweat on the head and helps to maintain ideal comfort. The pads are removable, you can take it off the padding for washing to make sure your next clean and cool riding journey. Wide ApplicationSuitable for riding, climbing, skiing, roller skating, skateboarding, etc. Our cycle helmet is a good choice for you. They are comfortable and safe.