The castelli team sky difesa cap at first glance looks like one of those old school winter club hats every cyclist wore before helmets came to market and in a way it is it has a peak to keep the rain off your glasses and flip down ear flaps to keep your ears back of your neck warm but instead of acrylic with a nylon panel at the front you get a combination of gore windstopper x lite and nanoflex making this a very techy winter cap suitable for the very worst that winter can throw at you