V.I.B. 400 is a light 830 grams down filled sleeping bag for year round outdoor use. The V.I.B. 400 is part of the very popular V.I.B. range of Yeti bags with the finest possible European goose down filling wrapped in a casing with a wealth of technical details. The V.I.B. 400 has a full down collar and S-Box construction. The outer fabric is breathable and water repellent – and the inside lining has the V.I.B. series trademark signal colour. Pack size is small making the V.I.B. 400 the choice when you want to carry as little as possible but still get full cold protection.
Energetically, geese and ducks are the most efficient combined heat and power plants of all time. Thousands and thousands of super-soft filaments, consisting of the horn substance keratin, grow radially from a tiny core. Each of these filaments is provided with innumerable fibre ramifications. If many down come together, they stick together with their hooks and form many small heat-storing air chambers. A natural system that is lighter, more flexible and better insulated than anything man has ever invented. Yeti goose down achieves the highest possible bulking power of up to 900 cubic inches (cubic inches). Yeti exclusively uses European down, mainly from Germany and Poland. Every single down complies with the EDFA Traceability Standard.