Double sleeping bag Sea to Summit Spark -9C Down - Double

Introducing Sea to Summit's first Spark series double trekking sleeping bag. Extremely light and compact, this model uses high-quality down insulation with over 850+ cuin swelling and weighs just 1543g – extremely light for a double sleeping bag suitable for winter use in moderately cold climates.

The Spark Double is part of the brand's Spark series of sleeping bags. This series is focused on unique performance when both high thermal insulation properties and extremely low weight as well as compact size in the compressed state are required. For over 5 years, Spark bags have been the first choice of climbers, mountain photographers and adventurers looking for maximum comfort with minimum weight.

The Spark Double is suitable for autumn-winter use in our latitudes and for a spring-autumn sack in areas with a colder climate. The model is also suitable for the summer season in the mountains, as it can be unbuttoned all the way and used only as a blanket. Its temperature comfort is -2 degrees Celsius for women and -9 degrees for men. At the same time, its volume in a compressed state is extremely small, and its weight reaches only 1543 g.

The mummy shape, preserved even in a double sleeping bag, has a widening in the area of the feet to ensure better comfort when moving and to reduce the risk of freezing of the feet, which are particularly vulnerable. The construction is anatomical and offers optimal heat distribution. The relatively large hood and thick collar allow you to snuggle up tightly in the sleeping bag together with your closest person and isolate yourself completely from the cold. The model is compatible with all double sleeping bag sheets of the brand.

The outer fabric of the Spark Double is water resistant – a hallmark of the Spark series sacks. Down insulation undergoes a special treatment with hydrophobic polymers called Ultra Dry Down technology. Thus, it achieves a much better performance in humid conditions and does not stop warming even with some wetting. Most down sleeping bags that do not have such a treatment quickly lose their insulating properties in wet weather because the down "clumps up" and the air pockets that ensure heat retention disappear. The down with Ultra Dry Down technological treatment does not allow pilling and retains its property of limiting heat loss from your body for a longer time.

The down in Spark Double is an extremely high class down with a fill power of 850+ cuin. Typically, products with 650+ cuin swell are considered high-end mountain use. This makes the Spark Pro sleeping bag particularly compact, warm and light.

If you are looking for a four-season double sleeping bag with a focus on the winter season, the Spark Double is an unbeatable choice that combines perfect insulating properties with waterproof down, extremely light weight and compact dimensions in a compressed form.