Laugh in the face of savage sub-zero temperatures and scoff at vicious white-outs thanks to the supreme warmth of the Rab Men"s Neutrino Endurance Down Jacket. An outer shell of Pertex Endurance fabric wards off the weather while 800-fill hydrophobic goose down holds in vital warmth without packing out thanks to a stitch-through baffle construction. Despite it"s massive warmth and medium-length cut, this packable jacket stuffs down small inside the included stuff sack so your already-bursting expedition pack won"t blow a seam.