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Sea to Summit

Ascent -1 Regular Down Sleeping Bag

Designed for comfort and adaptability and suited to a wide range of adventures

Down Filled Water Resistant Lightweight

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Scales

Packability

Ultra Compact

Compact

Mid Size

Warmth

Summer

Multi-season

Alpine

Weight

Ultralight

Lightweight

Midweight

Product Specifications

Compression 8 Litres (both sizes)

Fill weight 300g (Regular), 343g (Long)

Fill ULTRA-DRY Goose Down 750+ Loft, RDS certified

Fits to 185cm (Regular), 198cm (Long)

Foot width 59.5cm (Regular), 64.5cm (Long)

Inner 20D recycled polyester with a non-PFC DWR finish

Outer 20D recycled polyester, 10D nylon hood and footbox

Shoulder width 78cm (Regular), 84cm (Long)

Temp rating 3°C comfort rating woman / minus 1°C Lower comfort rating for men; Temperature rated in accordance with ISO 23537-1:2022

Trusted Opinions

Staff (1)

Steph Bivouac Team Member

The Ascent is a great all rounder sleeping bag is rated to keep you toasty in a light frost. With 750 loft down they are packable enough to throw in your backpack, and also appropriate for car camping adventures. With the ability to open the bag up for use as a blanked, but two zips, one for the footbox, and the other along the side where you can zip the male and female bags together. The hooded bag is roomy with its rectangular shape and internal zip pocket on the inside for overnight storage of small items you want to keep close at hand. The Ascent is a great all rounder sleeping bag is rated to keep you toasty in a light frost. If you are particularly susceptible to the cold, it may be worth pairing with a liner

Fit tip:

N/A

Trusted Opinions

Staff (1)

Steph Bivouac Team Member

The Ascent is a great all rounder sleeping bag is rated to keep you toasty in a light frost. With 750 loft down they are packable enough to throw in your backpack, and also appropriate for car camping adventures. With the ability to open the bag up for use as a blanked, but two zips, one for the footbox, and the other along the side where you can zip the male and female bags together. The hooded bag is roomy with its rectangular shape and internal zip pocket on the inside for overnight storage of small items you want to keep close at hand. The Ascent is a great all rounder sleeping bag is rated to keep you toasty in a light frost. If you are particularly susceptible to the cold, it may be worth pairing with a liner

Fit tip:

N/A

Features

• Relaxed Mummy Fit: A more relaxed yet tapered mummy fit with high thermal performance
• Lightweight 100% recycled 20D nylon shell with a non-PFC DWR finish to protect against wind and moisture and a 20D recycled nylon liner for greater comfort
• bluesign®-approved fabrics
• 750+ Fill Power, RDS-certified, Goose Down with ULTRA-DRY Down treatment for improved water resistance in damp conditions
• Free Flow Zip System for reliable, snag-free operation and minimal weight:
  • Primary zip: full-length #5 with zip-plow and two sliders
  • Secondary zip: 1/2-length #3 with zip-plow and two sliders
  • Footbox zip: #5 with two sliders
• Vertical chest baffles, horizontal baffles in the lower half and base, box wall baffle construction throughout
• Generous fitted hood with two soft touch adjustments and fits a Sea to Summit regular pillow
• Fitted front draft collar: scalloped over the neck and oversized at the shoulders
• Single, down-filled draft tube along the top of zips
• Internal pocket for phone / GPS / valuables
• Pairs with women's Sea to Summit bags for a snug double sleeping bag
• QuiltLock System allows integration with Sea to Summit quilts
• Comes with an Ultra-Sil compression bag and a storage cell

Sea to Summit

Spark Ultralight -1 Women's Down Sleeping Bag

Lightweight down female-specific mummy-shaped bag

Down Filled Water Resistant Lightweight

Select options

Scales

Packability

Ultra Compact

Compact

Mid Size

Warmth

Summer

Multi-season

Alpine

Weight

Ultralight

Lightweight

Midweight

Product Specifications

Compression 5 Litres (Regular), 8 Litres (Long)

Fill weight 375g (Regular), 430g (Long)

Fill ULTRA-DRY Goose Down 850+ Loft, RDS certified

Fits to 170cm (Regular), 185cm (Long)

Foot width 46cm (Regular), 51cm (Long)

Inner 10D nylon with a non-PFC DWR finish

Outer 10D nylon

Shoulder width 71cm (Regular), 76cm (Long)

Temp rating minus 1°C comfort rating woman / minus 7°C Lower comfort rating for men; Temperature rated in accordance with ISO 23537-1:2022

Average weight 584g (Regular), 639g (Long)

Trusted Opinions

Our experts haven't reviewed this product yet.

Features

• Women's Mummy Fit: Fitted cut with generous anatomical footbox and technical hood, to maximise thermal efficiency and minimise bulk and weight. Wider at the hips and narrower at the shoulders for a better fit and heat retention for women.
• bluesign®-approved 10D nylon shell and lining fabric offers breathability, protection and effective temperature regulation for premium comfort in the outdoors; PFC-free DWR (durable water repellent) treatment keeps the hood and footbox highly water resistant
• 850+ Fill Power, RDS-certified, Goose Down with ULTRA-DRY Down treatment for improved water resistance in damp conditions
• Half-length #5 zip with anti-snag zip plow and two sliders
• Vertical chest baffles, horizontal baffles in the lower half and base, box wall baffles in the top half and sewn-through quilted construction lower half
• Technical fitted hood with soft touch adjustment, extra deep for cosy-like feel
• Standard front draft collar
• Single, down-filled, draft tube along the top of all zips
• QuiltLock System and drawcord footbox enables quilts to be secured to Sea to Summit sleeping bags for added functionality and freedom
• Comes with an Ultra-Sil compression bag and a storage cell
• Ultralight does not mean ultra-tight: The Spark mummy sleeping bags are snug but still have adequate wiggle room for the performance-oriented, backcountry user

Ascent -1 Regular Down Sleeping Bag

Spark Ultralight -1 Women's Down Sleeping Bag