The Thermic Neutrino Sleeping Bag Liner is designed to warm Rab's Neutrino line of sleeping bags, but it's compatible with most other mummy bags. The liner's microfleece construction is incredibly warm and soft without sacrificing the durability you expect from Rab's products.Microfleece sleeping bag liner provides more warmth for your slumberMummy shape offers plenty of room for adjustments and warmth Included stuff sack is easy to store and pack so you can bring it anywhereMaterial100% syntheticShapemummyDimensions32 x 73inClaimed Weight14ozManufacturer Warrantylifetime