The Ripper MIPS helmet is a performance mountain bike helmet at an unbeatable price. Benefitting from the development of the high-end helmets in the Sweet Protection line, the Ripper provides safety, comfort and style without breaking the bank. With extended coverage this helmet provides excellent protection yet optimal ventilation. This model is equipped with the MIPS Brain Protection System, a low-friction layer solution designed to reduce rotational forces transferred to the brain. The helmet comes in one size fitting head circumference from 53 cm to 61 cm (20.9 to 24.0 inches). Easily adjustable with the Occigrip turn-dial system.