Lightweight: Compact, 650 Fill Nikwax® Hydrophobic Down packs small while staying dry longer and drying faster than untreated down. Compact: Designed to easily fit into your pack. ThermaCapture Seams: Traps radiant body heat and retains warmth without adding excess bulk or weight. Updated Footbox: Newly shaped footbox can slip over your pad to eliminate drafts or over your feet for extra warmth. Draft Protection: Full-perimeter side baffles.