The Pro Thermal 2 Skully will add a touch of warmth under your helmet on a chilly day, while feeling comfortable against your scalp. Made from soft, stretchy material for a universal fit, it is constructed with flat-lock stitching and raw-cut edges for a smooth finish.Features:A warm skull cap that won't bunch under your helmetMade from soft, stretchy Thermoflex materialWith flat-lock stitching and raw-cut, lie-flat edgesReflective detailing adds to your low-light safetyUniversal men's fit