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).

It plays an important role, depending on the intended use of the sleeping bag. Ideally, for hiking, trekking, or mountaineering, a sleeping bag weighing less than 1.5 kg is recommended to facilitate transport and reduce the load on the backpack.

On the other hand, sleeping bags with greater weight are preferred for camping or stationary use.

Right

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

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.