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Sea to Summit - Ascent -9C - Down sleeping bag

5,0 (1)

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£454.95 £386.71 incl. duties and taxes

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At a glance

100% recommend

Full-length zip

Customers say: Lightweight

Customers say: Spacious

Customers say: Water repellent

Customers say: Price/performance

Adjustable hood

Customers say: Easily compressed

Mummy

Connectable

Draft collar

Three seasons

-2°C comfort rating

1157 g

Material information & features

Suitable for:: Men, Women
Recommended use:: camping, trekking
Design:: mummy sleeping bag
Main material:: 100% polyamide
Insulation:: 100% down
Material type:: down insulation
Material note:: contains non-textile parts of animal origin
Certifications:: Responsible Down Standard (RDS)
Fabric properties:: breathable, insulated, PFC-/PFAS-free, waterproof
Fill power:: 750+ cuin
Closure:: side zip
Comfort rating:: -2 °C
Lower limit rating:: -9 °C
Season:: 4-season, three seasons
Weight:: 1,157 g
Reference size:: per piece
Extras:: pillow pocket, connectable, draught collar
Item No.:: 513-1629

Product description

Versatile all-season down sleeping bag for outdoor adventures

The Ascent -9° down sleeping bag from the outdoor specialists at Sea to Summit is the Swiss Army knife of sleeping bags! With a lower limit of -9° Celsius and a comfort temperature of -2°C, this sleeping bag is certainly more suitable for the cooler times of the year, even if not for really harsh winters. The spacious mummy cut lets you sleep comfortably, yet also provides enough insulation to keep you warm. A Sea to Summit pillow (regular size) is also able to fit inside the hood of the sleeping bag. Plus, the Ascent -9° can be combined with other sleeping bags from Sea to Summit.

First-class choice of materials and workmanship

The outer material of the Ascent -9° is both waterproof and breathable, ensuring extra comfort both inside and outside of a tent. In addition, the RDS-certified goose down insulation boasts a fill power of 750+ cuin, which ensures top-class thermal performance. The down has been treated with Ultra Dry Down technology, giving it greatly improved water resistance. This sleeping bag features an intelligent baffle construction that has been adapted to the human anatomy, which ensures optimal heat distribution. Lastly, an ergonomically-shaped draught collar offers extra protection from the cold.

The advantages at a glance:

Intelligently cut, versatile mummy sleeping bag
High heat retention
Moisture-resistant down treatment
Intelligent construction

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Reviews overview

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5,0 (1)

100%

recommend this product

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This is what other customers say:

Question from Mark

31.10.2025

Hi, Does this come with the compression sack or is that extra? Thanks

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Let me know when new threads are added

Adrian (Community) | Customer Service

31.10.2025 12:59

Hi Mark,

This bag is supplied with a compression sack and a storage bag.

Comment

This is what customers from around the world say:

Monika

07.05.2026

Advantages

Easily compressed Adjustable hood Price / performance Water repellent Roomy Draft collar Lightweight Full length zip
Recommended use

Camping All around Beginner Trekking Hiking Mountaineering Expedition Travel

Yes, I would recommend this product to a friend