Sea to Summit

Ascent Long Down Sleeping Bag 25°F/-4°C

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Past season
Complex construction and high-quality down keep you warm when it's cold outside.

The Ascent Down mummy sleeping bag redefines the meaning of versatility keeping you cozy in colder conditions. At the same time, the triple-zipper Free-Flow Zip system ensures you stay cool and ventilated when the weather warms. Shaped to allow a natural sleeping position for comfort, while light and compact enough to go anywhere.

• Free-flow zipper system: Full-length Ykk® #5 main side zip, half-length opposite side zip and foot zip provides unparalleled ventilation and use as a comforter
• Vertical baffles over the chest to prevent down shifting as you roll over in your sleep
• Shaped hood, oversized draft collar and zipper draft tube keep the cold out and the warmth in
• Internal pocket for electronics and valuables
• Comes With: Ultra-Sil™ compression bag and storage cell
• Form a snug double sleeping bag by zipping to any Altitude, Journey or Venture sleeping bag

• Insulation: PFC-free Ultra-Dry Down 750+ Loft 90% Down Cluster Premium Duck Down certified Responsible Down Standard (RDS)
• Shell: Lightweight 20D Nylon Shell

• Best Use: Backpacking
• Shape: Relaxed Mummy
• Bag Series: Long-Ascent 1
• Bag Weight: 2 lbs 0.8 oz/930 g
• Compressed Vol: 6.4 L
• Compression Sack: S-10 L to 3.3 L
• Fill Weight: 13.1 oz/ 370 g
• Fits Up To Height: 6 ft 6 in/198 cm
• Season Rating: 2.5 Season
• Temperature Rating (En Lower Limit): 25°F/-4ºC
• Women's Temp Rating (En Comfort): 35°F/2ºC


  • Men
  • Adult
Temperature Rating
  • 0°C to -20°C
Insulation Type
  • Down
  • Responsible Down

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