The Sac features the latest in sleeping bag technology: the warm, strong, thermally-bonded Thermolink fill; lightweight, breathable 20-denier Vapour Vent fabric; an efficient, comfortable tapered rectangular shape and all the technical features you expect from a One Planet bag. The Sac is designed for general use – all you need to do is select the warmth required.
One Planet sleeping bags are rated using the European Standard EN13537. This means every sleeping bag has two ‘real world’ and one extreme rating. To determine what temperature might be most suitable for you see our technical pages.
- ‘Comfort’ rating is based on a ‘standard’ woman having a comfortable night’s sleep.
- ‘Limit of comfort’ is based on the lowest temperature at which a ‘standard’ man is deemed to be able to have a comfortable night’s sleep. This is the figure we use in our product descriptions.
- ‘Extreme’ rating is a survival rating for a ‘standard’ woman. According to EN 13537, ‘a strong sensation of cold has to be expected and there is a risk of health damage due to hypothermia’. This is a survival rating only, and consumers should not rely on this rating for general use. The best guidelines are the comfort and limit of comfort ratings.
Sac sleeping bags come in two sizes.
As a general rule, One Planet sleeping bags are a little roomier than other brands. The shoulder circumference measurementsgive an indication of the internal space in the sleeping bag.
A well-fitting bag will give the best performance. If you need more room, we offer a series of Sleeping Bag Expanders.
This bonded fibre weighs less and packs down smaller than competing synthetic fills, making our bags lighter and more compact while maintaining comfort and durability. The secret is in the manufacturing process: thousands of hollow fibres are sandwiched between a high-density thermal barrier and a fine, soft, body-conforming radiant retention layer to form one continuous sheet of Thermolink fibre. As it is one continuous layer, there aren’t any gaps for heat to escape, leading to better performance than traditional baffled fills.
Sac sleeping bags are made using lightweight and highly breathable 20-denier Vapour Vent fabric. This strong, compressible and highly breathable fabric uses a tight weave that keeps the insulation in but allows water vapour to escape. This reduces the possibility of clamminess and allows the insulation to loft fully for maximum performance.