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Sea to Summit

Spark Ultralight -9 Down Sleeping Bag

Lightweight down mummy-shaped bag for cold conditions

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

Average weight 730g (Regular), 786g (Long)

Fill weight 480g (Regular), 540g (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 minus 2°C comfort rating woman / minus 9°C Lower comfort rating for men; Temperature rated in accordance with ISO 23537-1:2022

Compression 13 Litres (both sizes)

Trusted Opinions

Staff (1)

Thais Bivouac Team Member

If your goal is to transition into more lightweight gear and carry less bulky items, then start with your sleeping bag. The Sea To Summit Spark series are the best lightweight to warmth ratio we stock in our store. The face fabric is only 10D which is why you can see the 850+ down through it and allows the sleeping bag to compress into a tiny bag. The -9c model is a great option if you are looking for a 3-season sleeping bag or even 4-seasons if you sleep warm and don't mind adding a couple of layers. I would use this bag anytime between late winter to beginning of winter if camping and all the way through NZ winter if hutting. The baffles by the torso area have been designed vertically so that the down stays in place when moving around to stop any cold spots.

Something to keep in mind is that due to the face fabric being so thin, this would not suit someone who is sleeping in harsh conditions and is rough with their gear. The mummy shape is very tapered and could feel restrictive for people who like to move around in their sleep and the zips don't unzip all the way around. Keep in mind those things when considering this model, but you will need to make some compromises if wanting to transition to lightweight gear.

Fit tip:

Tapered mummy shape

Trusted Opinions

Staff (1)

Thais Bivouac Team Member

If your goal is to transition into more lightweight gear and carry less bulky items, then start with your sleeping bag. The Sea To Summit Spark series are the best lightweight to warmth ratio we stock in our store. The face fabric is only 10D which is why you can see the 850+ down through it and allows the sleeping bag to compress into a tiny bag. The -9c model is a great option if you are looking for a 3-season sleeping bag or even 4-seasons if you sleep warm and don't mind adding a couple of layers. I would use this bag anytime between late winter to beginning of winter if camping and all the way through NZ winter if hutting. The baffles by the torso area have been designed vertically so that the down stays in place when moving around to stop any cold spots.

Something to keep in mind is that due to the face fabric being so thin, this would not suit someone who is sleeping in harsh conditions and is rough with their gear. The mummy shape is very tapered and could feel restrictive for people who like to move around in their sleep and the zips don't unzip all the way around. Keep in mind those things when considering this model, but you will need to make some compromises if wanting to transition to lightweight gear.

Fit tip:

Tapered mummy shape

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 baffle construction throughout
• 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
• Pairs with women's Sea to Summit bags and the 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

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

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

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

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

Exped

Comfort minus-5-Degree C Down Sleeping Bag

Extra roomy, thermally efficient mummy bag with arm hole and foot zip for use as parka or blanket

Select options

Scales

Packability

Ultra Compact

Compact

Mid Size

Warmth

Summer

Multi-season

Alpine

Weight

Ultralight

Lightweight

Midweight

Product Specifications

Average weight 890g (Small), 980g (Medium), 1190g (Long Wide)

Fill weight 430g (Small), 500g (Medium), 630g (Long Wide)

Fill 700+ cuin/oz European Grey Duck Down| RDS certified| OEKO-TEX® 100 certified| PFAS free

Fits to 170cm (Small), 180cm (Medium), 195cm (Long Wide)

Foot width 50cm (Small and Medium), 54cm (Long Wide)

Inner Recycled 30D nylon, OEKO-TEX® 100 certified, DWR free, PFAS free

Outer Recycled 20D ripstop nylon, OEKO-TEX® 100 certified, PFAS free

Shoulder width 74 (Small), 76cm (Medium), 89cm (Long Wide)

Temp rating minus 2°C (Comfort) minus 8°C (Limit) minus 26°C (Extreme)

Length 195cm (Small), 205cm (Medium), 220cm (Long Wide)

Rolled size 26 x 17 x 13cm / 5.7 litres (Small) 26 x 17 x 14cm / 6.1 litres (Medium) 26 x 17 x 16cm / 7 litres (Long Wide)

Trusted Opinions

Our experts haven't reviewed this product yet.

Features

• Recycled outer and inner fabrics
• 700 fill European Grey Duck down, sourced from producers that do not live-pluck or force-feed the birds
• Wide mummy shape increases freedom of movement while maintaining warmth
• 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
• Adjustable comfort hood with extra wide cut
• Adjustable draft collar reduces heat loss
• Thick draft tube and zip cover provide excellent heat retention
• Anti-snag stiffener ensures smooth zip operation
• Side arm exit for maximum flexibility: on the opposite side of the main zip, a zipped arm hole backed by a draft tube allows comfortable sitting while using both hands to hold a warm mug of tea or book
• 3D triangular footbox with 11 individual down-filled baffles eliminates cold spots
Zip opening at the foot end allows you to transform the bag into a blanket or parka as well as adding ventilation options
• Glow-in-the-dark zip pulls with large zip garage for comfort
• Bartack reinforcements where necessary for enhanced durability
• Infoprint inside the bag provides technical information including temperature ratings
• Comes with a sling storage bag with carrying strap and waterproof packsack
• 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 Trekking range designed with comfort and functionality over a wide scope of adventures and finely tuned for each season
• Carbon neutral: Exped measures, reduces and fully offsets CO₂ from manufacturing and shipping this product through myclimate

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Exped

Terra minus-5-Degree C Down Sleeping Bag

A go-everywhere, do-everything compact bag for reliable insulation and a high level of comfort in cold conditions

Select options

Scales

Packability

Ultra Compact

Compact

Mid Size

Warmth

Summer

Multi-season

Alpine

Weight

Ultralight

Lightweight

Midweight

Product Specifications

Average weight 850g (Small), 880g (Medium), 960g (Long), 1030g (Long Wide)

Fill weight 432g (Small), 450g (Medium), 593g (Long), 541g (Long Wide)

Fill 650+ cuin/oz European Grey Duck Down| RDS certified| OEKO-TEX® 100 certified| PFAS free

Fits to 170cm (Small), 180cm (Medium), 195cm (Long and Long Wide)

Foot width 48.5cm (Small), 49cm (Medium), 50cm (Long), 53.5cm (Long Wide)

Inner Recycled 20D ripstop polyester, OEKO-TEX® 100 certified, DWR free, PFAS free

Outer Recycled 20D ripstop polyester, OEKO-TEX® 100 certified, PU coated, PFAS free

Shoulder width 73.5 (Small), 76cm (Medium), 77.5cm (Long), 86.5cm (Long Wide)

Temp rating 1°C (Comfort) minus 5°C (Limit) minus 22°C (Extreme) All Exped sleeping bags are tested to lower limit per ISO 23537-1 testing

Length 195cm (Small), 205cm (Medium), 220cm (Long and Long Wide)

Rolled size 21 x 16 x 16cm (Small and Medium) 22 x 16 x 16cm (Long) 23 x 16 x 16cm (Long Wide)

Trusted Opinions

Our experts haven't reviewed this product yet.

Features

• Unisex sizing comfort for every adventurer
• 650+ fill European Grey Duck down, sourced from producers that do not live-pluck or force-feed the birds
• Adjustable comfort hood
• Adjustable active draft collar fits snugly around your neck to keep heat loss to a minimum
• Draft tube for excellent heat retention
• Anti-snag stiffener ensures smooth zip operation
• 3D triangular footbox with 11 individual down-filled baffles eliminates cold spots
• Bartack reinforcements where necessary for enhanced durability
• Comes with a sling storage bag with carrying strap and waterproof drybag
• 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 Trekking range designed with comfort and functionality over a wide scope of adventures and finely tuned for each season
• Carbon neutral: Exped measures, reduces and fully offsets CO₂ from manufacturing and shipping this product through myclimate

Spark Ultralight -9 Down Sleeping Bag

Spark Ultralight -1 Down Sleeping Bag

Comfort minus-5-Degree C Down Sleeping Bag

Terra minus-5-Degree C Down Sleeping Bag