Castelli Summer Skullcap Sweat management that disappears under your helmet When the temperature climbs and your jersey is already soaked, the last thing you want is sweat burning your eyes mid-descent. The Summer Skullcap solves that problem with a two-zone construction that keeps moisture off your face and heat moving away from your head. The mesh top panel pulls double duty - it lets air circulate freely while the wicking fabric headband around the base wicks sweat before it has a chance to drip. The whole package sits so low-profile under your helmet that you stop noticing it's there after the first few minutes. That's the point. Mesh top panel: promotes airflow directly against your scalp, reducing heat buildup beneath the helmet Low-profile, stretch fit: sits flat under any helmet without creating pressure points or altering your fit One-size construction: four-way stretch accommodates a wide range of head sizes without bunching or slipping | Castelli | Summer Skullcap Men's In White