The Madison Isoler Mesh One-Size Headband is designed for year round use, the Isoler Mesh headband fits perfectly under your helmet.   Madison Isoler Mesh One-Size Headband Features Designed for year round use, the Isoler Mesh headband fits perfectly under your helmet Works great in the summer keeping the sun and sweat at bay, as well as keeping the chill off in cooler months A combination of both lightweight Lycra and mesh doesn't compromise your helmets fit Flatlock stitched to prevent any unwanted chaffing or discomfort