BESSKY 18 Vents Adult Sports Mountain Road Cycling Ultralight Helmet (Red) 18 Vents Ultralight Sports Cycling Helmet with Visor Mountain Bike Bicycle Adult With removable, protective, sweat absorption lining pad and visor, comfortable to wear and easy to wash.channels allow the bike helmet to breathe like no other Stay safe while cycling with the bike helmet, perfect for on-road and off-road use. Well-ventilated and comfortable,a labyrinth of optimized internal channels allow the bike helmet to breathe like no other It is made of high quality material, you might even forget that you're wearing anything at all. Head Circumference: 56-62cm. Size L:17 x 20cm.