The mummy shape is widely used in sleeping bags for trekking and hiking, where reducing weight and achieving maximum compactness is paramount. You can find many different designs of this type of product, some narrower than others in order to achieve optimal lightening results. The search for the balance between weight, compactness and comfort is becoming more and more relevant, and many brands are betting on a design that implies narrowing, but within the framework of not depriving the sleeping bag of the necessary comfort. The material used for insulation still remains of primary importance for the volume and weight of a product in this category. Natural down is the insulation material used in the premium segment, due to its properties to compress extremely much, but at same time when absorbs the necessary air it provides significantly better insulation than synthetic materials. If you are not planning an expedition you can still look around for more attractively priced products, and you can find quite good alternatives from synthetic insulation as well. At CampingRocks you will find a variety of sleeping bags from the manufacturers Sea to Summit, Robens, Nomad, Trimm, Warmpeace, who thanks to their experience and constant search for innovation, have developed models to satisfy the requirements of even the most demanding adventurers regarding their equipment.