A low-profile design and weight of only 8.3oz make the Black Diamond Tracer Helmet ideal protection for climbers who don't want to look like construction workers. For a precise fit, this ultralight co-molded EPS foam helmet comes in three sizes and has a one-hand adjustment knob for micro-changes when you need to add a stocking hat. Fourteen vents give the Tracer Helmet excellent air flow, and the top six are covered with a mesh screen to keep them from filling with debris.