Rectangle

They offer high thermal performance thanks to their narrow design, which reduces air gaps and heat loss. They are lighter than rectangular ones due to the use of less material. Recommended for hiking, mountaineering, or extreme temperatures.

The comfort temperature is the lowest ambient temperature at which an average woman can sleep comfortably for 8 hours.

25

Sleeping bags with a comfort temperature of 12°C and above are recommended mainly for use during the summer months.

Synthetic

The synthetic filling offers warmth even when the sleeping bag gets wet, while it is more economical and easier to care for. However, it is heavier and less compressible than down and has a shorter lifespan.

The warmth of a sleeping bag is determined by the fill density inside it, which is measured in grams per square meter (GSM).

850

Suitable for very low temperatures.

Polyester

Durable and economical synthetic fabric, ideal for the exterior or interior of a sleeping bag. It does not absorb water, so it dries quickly and withstands moisture, while being resistant to sunlight and daily use. Its main disadvantage is that it may not be as soft to the touch as other fabrics.