For backpackers, a sleeping bag liner helps keep your sleeping bag free of dirt and body oils. Clean is good, since a clean bag doesn't require laundering and will last much longer. (It's much easier to launder a liner than a sleeping bag.) A bag liner also provides anywhere from 2°C to 15°C of extra warmth to your sleeping bag, depending on the liner material. In hot climates, you can use a bag liner or travel sheet by itself and forgo the sleeping bag.
For travelers, a mummy bag liner or travel sheet keeps you separated from bedding of questionable cleanliness or with possible bedbug infestations. It is recommended—and often even a requirement—in many hostels, and it's popular with budget hotel travelers, too.
MATERIAL: Brushed polyester/Cotton│Machine washable
FEATURES: Mummy model│designed to slip inside your sleeping bag│Packaged in a stuffsack│Fast drying
DIMENSIONS: Weight 280g│Height 220cm│Width 80/70cm
TEMPERATURES ° C: Adds extra value when used as lining +2.9 ºC