The Sea to Summit Ascent AcII sleeping bag is a versatile companion that redefines comfort and adaptability for your outdoor adventures. This mummy-shaped down sleeping bag ensures warmth in cold conditions and provides excellent ventilation for warmer weather.


  • ULTRA-DRY Down: Featuring 750+ Loft 90% Down Cluster Premium Duck Down certified under the Responsible Down Standard (RDS) for superior insulation.
  • Free-Flow Zipper System: The innovative triple-zipper Free-Flow Zip system includes a full-length YKK® #5 main side zip, a half-length opposite side zip, and a foot zip. This system provides unparalleled ventilation and allows the sleeping bag to be used as a comforter.
  • Vertical Baffles: These baffles over the chest prevent down shifting as you roll over during sleep, maintaining consistent warmth.
  • Shaped Hood and Draft Protection: The shaped hood, oversized draft collar, and zipper draft tube work together to keep cold air out and warmth in.
  • Internal Pocket: Convenient pocket for storing your phone, GPS, or valuables.
  • Lightweight Ultra-Sil Compression Bag: Easy to pack and carry, reducing the bag's volume.
  • Double Sleeping Bag Option: Form a snug double sleeping bag by zipping it to any compatible Altitude, Journey, or Venture sleeping bag.


  • BEST USE: Backpacking
  • PERFORMANCE: 3 Season
  • WEIGHT: 2lb 6.8oz | 1100g
  • COMPRESSED VOLUME: 6.2 liters

Enjoy the best of both worlds with the Ascent AcII sleeping bag, providing warmth in cold conditions and excellent ventilation for a comfortable sleep during warmer seasons.


Model # AAC2-R
Barcode # 9327868095131
Brand Sea to Summit

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