The Mountain Hardwear Men's StretchDown DS Hooded Jacket is a lightweight insulation layer designed for active pursuits. Dynamic stretch fabric maximizes freedom of movement and also keeps the down clusters properly lofted for optimal thermal performance. The unique welded baffling pattern efficiently traps warmth and avoids the cold spots caused by stitching. On the inside, the lofty 800-fill goose down is treated with water-repellent Nikwax™ to keep you dry and warm if exposed to wet or humid conditions. The slim, tapered profile is designed to fit comfortably under a shell and keeps out of your way while on the move.