Sea to Summit - Ascent AcI - Down sleeping bag

£ 334.95 30% from £ 234.47 incl. duties and taxes
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At a glance

% recommend
100% recommend
Customers say: Spacious
Customers say: Spacious
Hydrophobic down
Hydrophobic down
Three seasons
Three seasons
°C comfort rating
2°C comfort rating
Shop consciously!
Shop consciously!
860 g
Material information & features
Suitable for:
mummy sleeping bag
Recommended use:
camping, trekking
Main material:
100% polyamide
Inner material:
100% down
Material type:
duck down, down insulation
Material note:
contains non-textile parts of animal origin
Fabric treatment:
hydrophobic down
Fabric properties:
insulated, breathable
Fill power:
750+ cuin
90/10 (down to feather)
Fill weight:
Regular: 330 g; Long: 370 g
Shop consciously:
contains RDS certified down
side zip, drawstring
Comfort rating:
2 °C
Lower limit rating:
-4 °C
Extreme rating:
-21 °C
three seasons
860 g
Reference size:
Regular size
Weight (long): 930 g
Item No.:
Product description

Down sleeping bag offers an optimal balance between comfort and weight

The unique design of the Ascent Acl from Sea to Summit offers more space than traditional mummy sleeping bags, but still provides excellent thermal efficiency, so you can use it whilst adventuring above the tree line. The use of high-quality down with a fill power of 750+ cuin guarantees high levels of insulation. The down has a water-repellent treatment, so it will retain its shape when coming into contact with moisture, preventing it from collapsing and clumping together. This preserves the fill power and the thermal insulation performance.

Great zip system offers different ventilation options

The Free-Flow Triple-Zip System ensures high thermal capacity and efficiency and gives you a variable ventilation option. The half-length zip on the right and the full-length zip on the left allow you to stretch out your arms and give you the option of folding the upper portion of the bag over like a blanket. If it gets warmer outside, you can use the two-way full-length zip and the additional zip at the foot box to convert the bag into a quilt. If you get too cold, zip up the bag, cinch the drawcords and snuggle up in the large hood, which has a dual cord adjustment for ultimate comfort.

Can be coupled with other compatible sleeping bags thanks to zip coupling system

It features large zip channels with anti-snag construction to prevent body heat loss. Lastly, the Ascent AcI comes equipped with the Zip Coupling system, which allows you to pair this bag with other compatible sleeping bag models quickly and easily.

The features at a glance:

  • Warm three-season sleeping bag for a wide range of outdoor and camping adventures
  • Generous, wide cut for comfort
  • Soft, puffy and water-repellent down fill provides optimal insulation
  • Zip system offers different ventilation options
  • Can be combined with other sleeping bags

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This is what customers from around the world say:
Nils's profile picture

Product images by Nils
  • Advantages
    Full length zip
    Easily compressed
Gabriele's profile picture

62% have found the reviews
by Gabriele helpful

  • Advantages
    Easily compressed
Hosea's profile picture

22% have found the reviews
by Hosea helpful

  • Advantages
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    Packed dimensions

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