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Sea to Summit

Ascent -9 Regular Down Sleeping Bag

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

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 13 Litres (both sizes)

Fill weight 540g (Regular),617g (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

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

Temp rating minus 2°C comfort rating woman / minus 9°C Lower comfort rating for men; Temperature rated in accordance with ISO 23537-1:2022

Average weight 1020g (Regular), 1157g (Long)

Trusted Opinions

Staff (1)

Thais Bivouac Team Member

If you are looking for a very decent quality sleeping bag that is lightweight but don't want to give up on comfort, the Sea to Summit Ascent range is a fantastic place to look!

Though the shape of the bag still tapers at the bottom, the sleeping bag is much more rectangular than most mummy bags. The Free-Flow zip provides flexibility with temperature adjustment whether you want to use you bag as a quilt, stick your feet out or stick out your arms to read a book. The high quality 750+ down fill allows this bag to remain decently lightweight while still performing in cold temperatures. When going with a higher warmth rating like the -9 it usually means you might be using it on colder, longer nights where comfort will be key to a good sleep. The -9 would be a good choice for someone going on adventures all year long.

Fit tip:

Nice and roomy, good for side sleepers or people who tend to move around in their sleep.

Trusted Opinions

Staff (1)

Thais Bivouac Team Member

If you are looking for a very decent quality sleeping bag that is lightweight but don't want to give up on comfort, the Sea to Summit Ascent range is a fantastic place to look!

Though the shape of the bag still tapers at the bottom, the sleeping bag is much more rectangular than most mummy bags. The Free-Flow zip provides flexibility with temperature adjustment whether you want to use you bag as a quilt, stick your feet out or stick out your arms to read a book. The high quality 750+ down fill allows this bag to remain decently lightweight while still performing in cold temperatures. When going with a higher warmth rating like the -9 it usually means you might be using it on colder, longer nights where comfort will be key to a good sleep. The -9 would be a good choice for someone going on adventures all year long.

Fit tip:

Nice and roomy, good for side sleepers or people who tend to move around in their sleep.

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

Clearance

Clearance

Sea to Summit

Trek -1 Women's Down Sleeping Bag

Versatile and spacious bag with ULTRA-DRY Duck Down perfect for vehicle-based travels and overnight camping

Smart Buy Down Filled Insulated Water Resistant

Select options

Scales

Packability

Ultra Compact

Compact

Mid Size

Warmth

Summer

Multi-season

Alpine

Weight

Ultralight

Lightweight

Midweight

Product Specifications

Compression 18 Litres (Regular), 20 Litres (Long)

Fill weight 520g (Regular), 610g (Long)

Fill ULTRA-DRY Duck Down 650+ Loft, RDS certified

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

Foot width 60cm (Regular), 65.5cm (Long)

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

Outer 20D recycled polyester

Shoulder width 72.5cm (Regular), 77.5cm (Long)

Temp rating minus 1°C comfort rating woman / minus 11°C Lower comfort rating for men; Temperature rated in accordance with ISO 23537-1:2022

Average weight 1239g (Regular), 1418g (Long)

Trusted Opinions

Our experts haven't reviewed this product yet.

Features

• Women's-specific fit: Narrower at the shoulders, wider between the hips and knees. Regardless of the position you sleep in (figure-four, on your side or on your stomach), this shape provides a significantly higher level of comfort by giving you the room to move without compressing the insulation.
• Women's sleeping bags have additional insulation compared to unisex bags, positioned using different body mapping for thermal performance exactly where it is needed
• Sustainable construction with 100% recycled bluesign®-approved 20D polyester shell and lining, a PFC-free water-repellent coating and RDS down
• 650+ Fill Power, RDS-certified, 85% Down Cluster Premium Duck Down with ULTRA-DRY Down treatment for improved water resistance in damp conditions
• Free Flow Zip System for reliable, snag-free operation, to provide superior ventilation and allow the bag to be used as a comforter/quilt:
  • Primary zip: full-length #5 zip with zip-plow and two sliders
  • Secondary zip: half-length #5 zip with zip-plow and two sliders
  • Foot box zip: #5 with two sliders
  • Vertical chest baffles, horizontal baffles lower half and base, box wall baffle construction throughout
  • Generous fitted hood with two soft touch adjustments; fits a Sea to Summit regular pillow
  • Fitted front draft collar: scalloped over the neck and oversized at the shoulders
  • Single, synthetic-filled, draft tube along the top of all zips
  • Internal pocket for phone / GPS / valuables
  • QuiltLock System allows Sea to Summit quilts to be locked into place over the top of the Trek, giving you modular and versatile sleeping bag
  • Form a snug double sleeping bag by zipping to any unisex Sea to Summit sleeping bags
  • Includes lightweight Ultra-Sil compression bag and storage cell

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

Add to cart Adding... Sold out

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

Clearance

Clearance

Sea to Summit

Trek -9 Women's Down Sleeping Bag

Warm, versatile and spacious bag with ULTRA-DRY Duck Down perfect for vehicle-based travels and overnight camping

Down Filled Insulated Water Resistant

Select options

Scales

Packability

Ultra Compact

Compact

Mid Size

Warmth

Summer

Multi-season

Alpine

Weight

Ultralight

Lightweight

Midweight

Product Specifications

Compression 26 Litres (both sizes)

Fill weight 800g (Regular), 925g (Long)

Fill ULTRA-DRY Duck Down 650+ Loft, RDS certified

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

Foot width 60cm (Regular), 65.5cm (Long)

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

Outer 20D recycled polyester

Shoulder width 72.5cm (Regular), 77.5cm (Long)

Temp rating minus 3°C comfort rating woman / minus 9°C Lower comfort rating for men; Temperature rated in accordance with ISO 23537-1:2022

Average weight 1612g (Regular), 1800g (Long)

Trusted Opinions

Our experts haven't reviewed this product yet.

Features

• Semi-rectangular women's-specific fit is designed for spacious comfort when you're camping or traveling: slightly narrower at the shoulders and roomier through the hip area. Regardless of the position you sleep in (figure-four, on your side or on your stomach), this shape provides a significantly higher level of comfort by giving you the room to move without compressing the insulation.
• Women's sleeping bags have additional insulation compared to unisex bags, positioned using different body mapping for thermal performance exactly where it is needed
• Sustainable construction with 100% recycled bluesign®-approved 20D polyester shell and lining, a PFAS-free water-repellent coating and RDS down
• 650+ Fill Power, RDS-certified, Down with ULTRA-DRY Down treatment for improved water resistance in damp conditions
• Free Flow Zip System for reliable, snag-free operation, to provide superior ventilation and allow the bag to be used as a comforter/quilt:
  • Primary zip: full-length #5 zip with zip-plow and two sliders
  • Secondary zip: half-length #5 zip with zip-plow and two sliders
  • Foot box zip: #5 with two sliders
  • Vertical chest baffles, horizontal baffles lower half and base, box wall baffle construction throughout
  • Generous fitted hood with two soft touch adjustments; fits a Sea to Summit regular pillow
  • Fitted front draft collar: scalloped over the neck and oversized at the shoulders
  • Single, synthetic-filled, draft tube along the top of all zips
  • Internal pocket for phone / GPS / valuables
  • Form a snug double sleeping bag by zipping to other Sea to Summit sleeping bags
  • Includes lightweight Ultra-Sil compression bag and storage cell

Ascent -9 Regular Down Sleeping Bag

Trek -1 Women's Down Sleeping Bag

Ascent -1 Regular Down Sleeping Bag

Trek -9 Women's Down Sleeping Bag