Ultraweight Unisex Fixed Gear BMX Road Bicycle Bike High-Copy Caber Fiber Safety Helmet 100% brand new and high quality Made of PC + EPS; Good Foam Cushioning 26 Wind Tunnel Vents; L23 x W18 cm/L9" x W7"; Circumstamce:57-63 cm Ultra-light, wind tunnel, duct design, effectively reduce wind resistance 3 Color Available; For Unisex