This 3-season backpacking bag uses efficient synthetic insulation on the bottom and high-lofting, water-resistant down on top for outstanding warmth in temperatures down to 19°F. FILL. 650-fill down / SpiraFil synthetic. WEIGHT. Long - Left Zip: 3 lbs. 4 oz. Regular - Left Zip: 2 lbs. 14 oz. COMPRESSED VOLUME. Long - Left Zip: 8.5 liters. Regular - Left Zip: 8.4 liters. TEMPERATURE RATING (F). 20 degrees (F)

• Synthetic insulation on the ground level and water-resistant, 650-fill-power down on top deliver excellent warmth, even in damp, cold conditions
• Body-mapped insulation yields maximum thermal efficiency by increasing insulation around the parts of the body that need it most
• Hard-wearing outer shell has ripstop nylon on top and polyester on bottom
• 3D hood construction provides an ergonomic fit for greater warmth
• Full-length zipper is backed with a snagless, insulated draft tube