Winter group rides often roll out before the day has warmed up, and the Assos Winter Cap P3 meets that chill with double-knit layers of insulation across the forehead and ears. This insulated winter cycling skull cap adds coverage on the sides in its P3 update. As a thermal cycling cap, it suits cold weather rides from roughly 39 to 52 degrees Fahrenheit. What Our Gearhead(R) Experts Are Saying:"By the last hour of long winter rides, my head still felt as dry as it did at the start. The fabric carried sweat away from my skin, and the warmth lasted to the end of the ride."