Designed as a cold weather midlayer, the Arenite fleece from Arc'teryx is constructed from Cobblecomb flexible and insulating polyester. Minimalism and functionality are synonymous with Arc'teryx and the new Arenite Jacket is prime example of how these contrasting design principles can be combined to great effect. The athletic fit reduces drag and tracks close to the body for a secure and ergonomic fit worn with or without an outer shell layer.