Sherpa Fleece - WillowThe Ultimate Retro Adventure Fleece. Put simply, the Sherpa Fleece is the ultimate. Its a bold statement, but once you get your hands on it, you will quickly realize why. The deep pile external sherpa combined with a boxy fit gives that old school retro fleece feel, alongside offering superior warmth and heat retention. The heat retention and warmth is also due to the internal laminated mesh lining. This lining is also 8K waterproof and 2K breathable,