Mummy

It offers high thermal performance thanks to its narrow design, which reduces air gaps and heat loss. It is 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.

1

Sleeping bags with a comfort temperature between -9°C and 2°C are recommended for use in Spring, Summer, and Autumn (3 seasons).

Left

It not only concerns the ability to connect with another sleeping bag but also the ease of use. The zipper on the left side (as you lie down) is more convenient for right-handed people.

Down

It offers warmth, high breathability, and minimal weight. Sleeping bags with down take up little space as they are highly compressible. However, if they get wet, they lose their properties and are more expensive compared to synthetic ones.