The used hollow fibre Insufil Thermo gives not only excellent insulation, but also significantly lower the weight of the sleeping bag. Ideal for everyone who values a brilliant balance between weight, performance, and price.  The filling is made of 2 x 120 g/m2 Insufil Hermo hollowfibre which guarantees a perfect insulation and does not flatten. Outer material contains of 40D 240T Tactel RipStop Nylon with RipStop modification, inner material is made of Soft Nylon