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Sea to Summit Spark IV

Ultra-light goose down sleeping bag offering a comfort temperature of -8°C for a total weight of 880g in size R.
€489.00

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Availability: In stock

The opinion of Aventure Nordique

The Spark 4 from Sea to Summit is an ultra-light and warm sleeping bag. It is filled with 620 grams of 850 cuin European goose down, 90/10 distribution, which corresponds to a comfort temperature of -8°C (according to the European standard EN13537).


The inner and outer shell is made of lightweight 7 denier / 10 denier nylon, which is pleasant to the skin.


Lightness: quality down and ultralight envelope = a down in Regular size that weighs 880 g.


Insulation: the Spark IV has a flap along the zip and a wraparound hood.


The full zip with double slider makes it easy to access and manage ventilation.


For the filling, Sea To Summit has opted for a different lining according to the essential areas of the body, optimising insulation :



  • Vertical padding at the torso to prevent the down from moving.

  • Horizontal padding on the lower part to minimize the weight of the sleeping bag.


It is both light and warm, making it a good all-rounder for overnight stays in the mountains. High quality materials and careful manufacturing. The upholstery is treated against humidity to keep its beautiful swelling.

Technical details

Manufacturer Sea to Summit
Product name Spark SP IV
Season 4 season
Model Unisex
Fill Goose Down
Cuin 850
Comfort rating -8°C
Comfort Limit -15°C
Extreme rating -36°C
Dimensions M : up to 183 cm - L : up to 198 cm
Shoulders - Hips - Feet: M : 155/135/94 cm - L : 162/142/100 cm
Folded size M : 10 > 3.3L - L : 10 > 3.3L (ø18 x 40 cm)
Outer shell Nylon 7 deniers
Inner lining Nylon 10 deniers
Fill Weights M : 620 g - L : 700 g
Weight M : 880 g - L : 985 g
Zipper Left
Colour Gray
Additional information
  • Contoured mummy shape for efficient insulation
  • Expedition mummy bag sizing provides extra space for layered clothing or extra wriggle room
  • Updated sizing provides extra room for both shoulders and hips while still maintaining insulation efficiency
  • Includes lightweight Ultra-Sil Nano compression bag for compact storage
Eco-responsible contribution The Responsible Down Standard (RDS) label guarantees the protection of goose and ducks reared for the production of sleeping bags or down jackets containing feathers and down. The RDS lining means that it does not come from animals that have been subjected to cruel treatment. This label allows traceability to identify the origin of the down.ant subi des traitements cruels : gavage, plumaison à vif. Ce label permet une traçabilité permettant d’identifier la provenance du duvet.

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