The Arcteryx Phase AR Beanie is a great choice for staying warm in low-temperature conditions. Featuring Phasic AR fabric for fantastic moisture wicking and quick drying capabilities, this Arcteryx Beanie also has silver-ion encapsulated into the fibers for long-lasting odor control. The Phase AR was designed to fit your head and retain its form without binding and because it is so well adapted to rapidly transfer moisture you will have better temperature regulation during high aerobic activities in colder weather. The Smooth outer face of Phasic AR fabric is durably pill resistant and has a lighter lofted interior to add a touch of light insulation and Phase AR Beanie packs up small for easy travel and storage. The Arcteryx Phase AR Beanie will keep you warm, dry and comfortable during high output winter activities.