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Sea to Summit Ascent™ 25 Sleeping Bag

sku# 169434
Sea to Summit - Ascent™ 25 Sleeping BagSea to Summit - Ascent™ 25 Sleeping BagSea to Summit - Ascent™ 25 Sleeping BagSea to Summit - Ascent™ 25 Sleeping BagSea to Summit - Ascent™ 25 Sleeping BagSea to Summit - Ascent™ 25 Sleeping BagSea to Summit - Ascent™ 25 Sleeping Bag
Model Info
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Product Info

The Sea to Summit Ascent™ 25 Sleeping Bag is the least insulated in the Ascent line, but still boasts the high-loft down, oversized draft collar and shaped hood that make its thicker siblings so warm. The innovative baffling system keeps the insulation from falling to your back like in a traditional horizontal pattern, but also keeps it from falling to your feet like in a traditional vertical baffle. This way, your core stays warm, keeping your whole body warm despite the lighter construction of the sleeping bag.

Product Details


Lightweight 20D Nylon Shell


Ultra-Dry Down 750+ Loft90% Down Cluster Premium Duck Down

Responsible Down Standard Certified


Compressed Volume, Regular4.9L

Compressed Volume, Long6.4L


Free Flow ZipThe half-zip on the right side of the bag (left side on women's bags) provides freedom of movement for both arms, additional ventilation and allows the top third of the bag to be folded down as a mini quilt when the mercury climbs higher than expected.

Zip CouplingA 65 inch #5 YKK full-length zip allows a unisex left-handed and women's specific right-handed bag to pair together. Designed to pair side by side, each person sleeps in their own bag enabling each of you to take advantage of your bag's unique insulation zones, hood and footbox features - perfect for cozy adventures for two.

ShapeMore room between hips and knees to allow you to sleep in a natural position without compressing the down insulation and creating cold spots. Far more comfortable than narrow mummy bags for most sleepers.

Vertical Baffles Over Chest

Shaped Hood

Oversized Draft Collar

Internal Zipper Pocket

Zipper Draft Tube

Forms a Snug Double Sleeping Bag By Zipping to Any Altitude, Journey or Venture Sea to Summit Bag

Includes Lightweight Ultra-Sil Compression Bag and Storage Cell

2.5 Season Rating25°F (comfort range 25°F to 65°F)


  • Insulation: Down
  • Temperature Rating: 25
  • Shape: Mummy
  • Stuff Sack Size: 10L - 3.3L
  • Warranty: Limited Lifetime
Size Long Regular
Length Long Regular
Zipper Location Left Side Left Side
Max User Height 6'6" 6'
Weight (lbs) 2.05 1.89
Weight (g) 930 860

Other Notes

Sea to Summit products can only be shipped within the United States and Canada



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