The Tension Brick 400 is a mid-weight spacious and comfortable down bag that offers you full protection from the cold. You should choose the brick shaped bag if you prefer a roomy nights sleep with proper leg room and freedom of movement. The technical and detachable hood can be used from both sides and the bag can be combined with another similar bag by easily zipping the two units together. The two-way full length zipper is down covered to keep the hot air inside the bag where you can enjoy it.
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.