Wear this compressible cap with the flaps up on normal days, and it keeps you warm with a soft polyester fleece lining and 60-gram Primaloft Gold insulation. Blizzard days? Lower the soft, fleece-lined flap and spare your ears the anguish of stinging sleet and numbing cold. 100% quilted nylon shell repels moisture, blocks wind. Squeezes down small to fit in a pocket or backpack – ready whenever the next cold snap hits. Zippered flap pocket stows keys, cards and lip lube.