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Sea to Summit

Spark Ultralight 7 Down Sleeping Bag

Lightweight down 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

Fill weight 150g (Regular), 170g (Long)

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

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

Foot width 51cm (Regular), 56cm (Long)

Inner 10D nylon with a non-PFC DWR finish

Outer 10D nylon

Shoulder width 77.5cm (Regular), 82.5cm (Long)

Temp rating 11°C comfort rating woman / 7°C Lower comfort rating for men; Temperature rated in accordance with ISO 23537-1:2022

Average weight 363g (Regular), 387g (Long)

Compression 2 Litres (Regular), 3 Litres (Long)

Trusted Opinions

Staff (1) Expert (1)

Thais Bivouac Team Member

If you are looking for an ultralight sleeping bag , you are in the right place. The Spark 7c is incredibly lightweight and packs ridiculously small making it ideal for anyone looking for a minimal summer sleeping bag for fast and light adventures. The mummy shape can feel quite restrictive for some people and the 10D fabric require careful handling to prevent any damage. This option is good for someone who doesn't want to sacrifice high quality down insulation, while keeping their gear to a minimal weight.

Fit tip:

Snug fit

Braden Currie Endurance Athlete

Performance and Comfort in a Lightweight Package

"The Spark 7 is one of the more compact sleeping bags on the market. It is really comfortable with the 3/4 zip and even the little features of the plastic flaring that goes over the zip to stop it from catching the fabric and making it more comfortable for sleeping. I find while this bag is rated to 7 degrees, with a small amount of clothing on during the night it is quite comfortable down to 5 or 6 degrees overnight temps."

Trusted Opinions

Staff (1) Expert (1)

Thais Bivouac Team Member

If you are looking for an ultralight sleeping bag , you are in the right place. The Spark 7c is incredibly lightweight and packs ridiculously small making it ideal for anyone looking for a minimal summer sleeping bag for fast and light adventures. The mummy shape can feel quite restrictive for some people and the 10D fabric require careful handling to prevent any damage. This option is good for someone who doesn't want to sacrifice high quality down insulation, while keeping their gear to a minimal weight.

Fit tip:

Snug fit

Braden Currie Endurance Athlete

Performance and Comfort in a Lightweight Package

"The Spark 7 is one of the more compact sleeping bags on the market. It is really comfortable with the 3/4 zip and even the little features of the plastic flaring that goes over the zip to stop it from catching the fabric and making it more comfortable for sleeping. I find while this bag is rated to 7 degrees, with a small amount of clothing on during the night it is quite comfortable down to 5 or 6 degrees overnight temps."

Features

• Mummy Fit: Fitted cut with generous anatomical footbox and technical hood, to maximise thermal efficiency and minimise bulk and weight
• 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, sewn-through baffle construction throughout
• Technical fitted hood with soft touch adjustment, extra deep for cosy-like feel
• No draft tube
• QuiltLock System allows integration with Sea to Summit quilts
• 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

Clearance

Clearance

Exped

Ultra minus-5-Degree Down Sleeping Bag

The extremely lightweight and compact 3-season sleeping bag

Select options

Scales

No scale data available.

Product Specifications

Fill weight 450g (Medium), 480g (Large)

Fill 850+ cuin/oz European Goose Down (US 90/10)| RDS certified| OEKO-TEX® 100 certified

Fits to 180cm (Medium), 195cm (Large)

Foot width Inside: 48cm (Medium), 49.5cm (Large)

Inner Recycled 15D ripstop nylon, OEKO-TEX® 100 certified, PFAS-free, DWR free

Outer Recycled 10D ripstop nylon Pertex® Quantum, PFAS free, bluesign® approved

Shoulder width Inside: 74cm (Medium), 75.5cm (Large)

Temp rating 2°C (Comfort) minus 4°C (Limit) minus 20°C (Extreme)

Average weight 815g (Medium), 850g (Large)

Length 203cm (Medium), 218cm (Large)

Rolled size 23 x 14 x 15cm (Medium), 30 x 17 x 17cm (Large)

Trusted Opinions

Our experts haven't reviewed this product yet.

Features

• Lightest construction with recycled Pertex® Quantum made entirely of recycled polyamide
• Components such as the zip and webbing are made of recycled PET bottles
• Downshift function for enhanced heat distribution: the all-round, H-shaped down chambers allow the down to be 'shaken upwards' as required and the sleeping bag to be adapted to the respective temperature conditions
• Extremely light, very small pack size with passive draft collar
• Lightweight material and box-baffle construction
• Optimised fit provides better insulating performance
• Tuck-stitch seam technology for enhanced durability and moisture protection; multiple fabric layers stitched together and tucked away create stronger seams
• Adjustable contoured hood and plush draft collar to keep body heat in
• Adjustable elliptical draft collar nestles around the neck and closes with a snap, minimising draft and heat loss
• Thick draft tube provides excellent heat retention
• Anti-snag stiffener ensures smooth zip operation
• Differential cut (liner is shaped smaller than the shell) for optimal down lofting and comfort
• 850 fill European duck down 90/10, sourced from producers that do not live-pluck or force-feed the birds
• 3D triangular footbox with 11 individual down-filled baffles eliminates cold spots
• Glow-in-the-dark zip pulls with large zip garage for comfort
• Bartack reinforcements where necessary for enhanced durability
• Two-way zips increase flexibility and allow for temperature regulation
• Infoprint inside the bag provides technical information including temperature ratings
• Comes with a waterproof stuff sack and mesh storage bag
• Loops at the foot end so you can secure your bag while airing without risk of it being blown away by wind
• Part of Exped's Fast and Light Series
• This product meets bluesign® product requirements, which means materials and components have been selected that adhere to rigorous environmental and social criteria during production
• Carbon neutral: Exped measures, reduces and fully offsets CO₂ from manufacturing and shipping this product through myclimate

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

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

Compression 8 Litres (both sizes)

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 Down Sleeping Bag

Lightweight down 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

Fill weight 265g (Regular), 305g (Long)

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

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

Foot width 51cm (Regular), 56cm (Long)

Inner 10D nylon with a non-PFC DWR finish

Outer 10D nylon

Shoulder width 77.5cm (Regular), 82.5cm (Long)

Temp rating 4°C comfort rating woman / minus 1°C Lower comfort rating for men; Temperature rated in accordance with ISO 23537-1:2022

Average weight 493g (Regular), 536g (Long)

Compression 8 Litres (both sizes)

Trusted Opinions

Our experts haven't reviewed this product yet.

Features

• Mummy Fit: Fitted cut with generous anatomical footbox and technical hood, to maximise thermal efficiency and minimise bulk and weight
• 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
• 3/4-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 zips
• QuiltLock System allows integration with Sea to Summit quilts
• 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

Spark Ultralight 7 Down Sleeping Bag

Ultra minus-5-Degree Down Sleeping Bag

Ascent -1 Regular Down Sleeping Bag

Spark Ultralight -1 Down Sleeping Bag