75D 2MM diamond ripstop shell is water-resistant and won?t tear even if you snag or puncture it * Light weight TrailHead +20°F weighs only 2.9 pound for easier backpacking * Features PolarLite Insulation. The innovative 7-denier interwoven insulation gives warmth without bulk * Full-length zipper draft tube helps keep warm air in and cold air out * Longer and wider 87-Inch L x 32-Inch W x 22-Inch W size fits larger frames, +20°F