Bontrager Thermal Cycling Cap is packed with features such as foldable double layer ear flaps, thermal fabric to trap heat & wick moisture. Its lows profile makes it easy & comfortable to wear under your helmet. Its brim provides sun & rain protection Features Thermal fabric traps body heat & wicks moisture, keeping you warm & dry The low-profile design allows easy layering under helmets Traditional cycling cap brim provides sun or rain protection & adds timeless style Double-layer ear flaps keep ears toasty on cold days Fold-up ear flaps allow better temperature regulation