The fill is 800-fill PFAS-free hydrophobic down, RDS certified and loaded generously at 34 oz in the Regular size, maintaining loft and warmth through the extended damp and cold of multi-week expedition use. The snorkel hood is the standout feature at this temperature rating, using condensation-resistant synthetic insulation and a magnetic closure to seal out cross-draughts while routing exhaled moisture away from the bag to protect loft over time. Overstuffed draft tubes along the zipper and a cinchable draft collar close off every potential cold point. Side vents zip open for arm access and temperature regulation without requiring you to exit the bag, with overlapping draft tubes preventing cold spots when closed.

The Toe-asis foot pocket concentrates insulation in the footbox for rapid foot warming, and an interior stash pocket keeps small essentials accessible and protected from freezing. Shell and liner are 100% recycled 20D nylon ripstop with a PFAS-free DWR finish, keeping the bag as light as possible given the substantial fill requirement.

• Temperature rating: -20°F/-30°C (EN Comfort -4°F/-20°C, EN Limit -20°F/-30°C)
• Fill: 800-fill PFAS-free hydrophobic down (RDS certified)
• Shell and liner: 100% recycled 20D nylon ripstop with DWR
• Regular: 3 lbs 4 oz (1.48 kg), fits to 6'0" (183 cm), packed 8.5 x 10 in
• Long: 3 lbs 7 oz (1.56 kg), fits to 6'6" (198 cm), packed 8.5 x 10 in
• Snorkel hood with magnetic closure and synthetic insulation
• Side vents with overlapping draft tubes
• Toe-asis foot warmer pocket, interior stash pocket
• YKK anti-snag zipper, cinchable draft collar, external quilt loops
• Includes compression sack and storage sack