Brooks Notch Thermal Beanie Hats & Headwear Heather Berry : Designed for performance despite the elements, the Brooks Notch Thermal Beanie provides warmth and protection where you need it most. DriLayerA(R) Threshold thermal fabric and a notched fleece interior provide insulation, keeping your head and ears warm. Features a reflective Brooks logo at the front. Made sustainably with 50%+ bluesignA(R) fabric. Features a soft and warm, notched fleece interior.