Mountain Hardwear Phantom 0 Sleeping Bag - Men's Crimson Left Hand Long Nylon Q Shield 800 fill down has an advanced treatment applied that resists heat robbing moisture and retains maximum loft in damp conditions Performance mummy is cut snug, for maximum warmth and minimum weight Tight 5" baffle spacing maximizes loft Lightweight two-way #3 zipper for easy entry and exit Six-chamber hood design maintains even loft around head for consistent warmth