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.

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.

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

150

Suitable for summer.

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.