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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

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

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

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

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

Spark Ultralight 7 Down Sleeping Bag