Offering the low bulk warmth of a synthetic puffy, but with much higher levels of breathability during active use, the Snow Peak Men's Flexible Insulated Full Zip Hoodie is filled with Polartec Alpha insulation for optimal comfort in cool weather conditions. Polartec Alpha insulation is made of spun poly filament fibers that mimic the super light, high loft warmth of leading synthetic insulation types, but it's extremely breathable during aerobic activities, giving it the designation as the first ever breathable puffy garment. Its lightweight polyester shell features a DWR treatment for high levels of water resistance 20k when you're walking through passing rain showers and wintertime snow flurries. The smooth polyester lining offers incredible next to skin comfort, while the drawstring adjustable hood offers extra protection from brisk conditions. Additionally, you'll find large kangaroo pockets for keeping your hands warm in chilly weather.