The Tropen is a light-weight sleeping bag with an extremely small packing size and minimum weight. Its remarkable,feature is its vapour permeability which is very important for hot and humid tropical nights. The Shelltrans shell fits loosely over the inner structure and provides an extra layer of insulation with no cold seams. This construction ensures warmth for cool, foggy nights. In warmer weather the bottom part of the two-way zipper can be opened for ventilation. The hood is equipped with a mosquito net which can be folded out of the flap if required (the mosquito net is in the front part of the bag and stored behind the flap with press studs) The net can easily be attached around the hood by means of the small non-snagging zipper.