Today's competitive racing demands the utmost scrutiny. There's no room for excess grams, superfluous drag, or wasted watts. That's why Kask created the Protone helmet to be the ultimate combination of aerodynamics and all-day comfort. It offers impressive venting, minimal weight, a supreme fit and streamlined aerodynamic efficiency. The Protone boasts 8 large vents up front and 6 in the back to draw air through and keep you comfortable. And, its Kask OctoFit adjustment system has floating cradle contact points and gel pads for an unparalleled fit. The Protone is finished out with an eco-leather chin strap that's comfortable and easy to clean, and removable and washable CoolMax padding. The Protone tips the scales at a scant 230 grams!