I picked up the Blue Bison Mountain Peaks Skull Cap for chilly mornings on the mountain. The acrylic knit is warm without being itchy, and the jacquard design gives it a nice textured look that stands out on the lift. One size fits most works for me, though it sits a bit snug on larger heads. It stays put under a helmet and packs down small in a jacket pocket. Good everyday beanie for the price, just not the thickest option for deep winter.