When out riding our favorite trails, knowing that our noggins are protected in case we go rubber side up lets us ride with even more freedom. The Giro Source MIPS is a new trail-ready helmet, built with MIPS for a layer that disperses rotational forces upon impact and an adjustable visor to better protect against the glare of the sun. 17 vents help pull air through the helmet, so you can stay cool as you hammer up your favorite climb.