The shape of the lightweight sleeping bags is something that has a lot of different characteristics too. A rectangular sleeping bag gives a camper more space but leaves a lot of room in between to be warmed up, but can be zipped up together and used as a bed if required for more sleeping space. On the other hand a mummy sleeping bags
keeps the camper warm and snug and is used by campers in colder environments. However, someone who like to move around a lot in their sleep may not find this kind of a bag very comfortable and may find it restricted. Another kind of sleeping bag is the one that is tapered to the legs and though not as constricted as a mummy bag still restricts movement. Any sleeping bag will have a longer span of life if a sleeping bag liner is inserted into the bag as this can be taken out and washed easily.
