Rab Neutrino Endurance Jacket - Men's The Pertex Endurance outer provides protection against storm and spindrift while retaining minimal weight and packsize, and high lofting is provided by the 220g of 96% pure white goose down Weight:625g; Pertex Endurance weatherproof outer Pertex Quantum inner saves weight and allows improved lofting 220g of white goose down with fill power 750 EU 850 US Water resistant zip provides a seal against the wind and spindrift