Sea to Summit Ascent -1ºC Down Sleeping Bag - Regular
All about this product
General
The Sea to Summit Ascent -1°C Down Sleeping Bag is a versatile, high-performance bag designed for a wide range of climates and adventures. Packed with technical features and thoughtful construction, it’s ideal for multi-day treks, weekend camping trips, or chilly nights in the mountains.
Filled with 750+ Fill Power Goose Down with a PFAS-free Ultra Dry Down treatment, this 2.5-season rated sleeping bag provides excellent warmth and improved water resistance in damp conditions. The relaxed mummy fit is shaped to allow a natural sleeping position, while remaining light and compact enough to take anywhere. Vertical chest baffles prevent down from shifting as you move throughout the night, and horizontal leg baffles maximise thermal efficiency.
On cold nights, tighten the technical hood, secure the draft-tube–protected zippers, and let the premium down keep you warm. For warmer conditions, the triple-zip Free-Flow system offers superior ventilation or opens the bag flat as a quilt. An opening footbox and fully open zippers add further ventilation, functionality, and freedom of movement, while an internal pocket keeps your phone or valuables secure and close by. Whether you’re seeking warmth in freezing temperatures or versatility on warmer nights, the Ascent -1C Down Sleeping Bag combines technical innovation with comfort, making it a reliable companion for a variety of outdoor adventures.
Technical details
Backpacking, camping
Materials:
Shell: Recycled 20-Denier Nylon with PFC-free DWR finish
Lining: Recycled 20-Denier Nylon
Insulation: 750+ fill power RDS-certified goose down, PFAS-free
Compression and storage bags: 40D RCS- recycled bluesign approved nylon
Key features:
Single, down-filled, draft tube along the top of all zippers
Generous fitted hood with two soft touch adjustments
Zips with any Sea to Summit women’s bag for double
Hood compatible with regular Sea to Summit pillow
Zipper plough eliminates zipper slider snagging
Horizontal baffles in leg section
Triple-zip Free-Flow system
Fitted front draft collar
Roomy mummy shape
Internal phone pocket
Box-wall construction
Vertical chest baffles
2.5-season rating
Opening footbox
Lightweight
Ventialted
Versatile
Tech specs:
Lower limit rating: -1ºC
Comfort: 3°C
Weight: 782g
Fill weight: 300g
Compressed volume: 5.5l
Maximum user height: 185cm
Fill power: Ultra-Dry Down 750+
Size and fit:
Size: Regular
Material
Insulation Type | Down |
Technical Features
Season rating | 3 Season |
Other features
Brand | Sea to Summit |
Product Code | G4HB3D0312 |
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