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.
|Manufacturer||Sea to Summit|
|Product name||Spark SP IV|
|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|
|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.|