The ultra-lightweight Filament Jacket features an incredible warmth-to-weight ratio, cutting the chill when worn alone in cool weather and holding in just enough heat as a mid-layer in truly nasty conditions. Its DWR-treated 10D Pertex® Quantum GL fabric sheds moisture, further increasing the versatility of this featherweight, year-round down layer. This fully packable lightweight jacket has a 800 down fill power. Use the pocket to stuff the jacket into for travel or compact carrying. Comes in men's sizes XS - 2XL in black.