It has a simple design that is easy to wear, and the wide spacing between the quilts maximizes the space created by the feathers, providing excellent heat retention. It can be easily put together by pulling the end of the tape loop in the center, and you can carry it by hanging it in your bag using the included carabiner. It is also a collaboration series with the outdoor brand NANGA, which is packable and compact when placed in a storage pocket, making it highly portable. The main body material is 15D ripstop nylon. The lack of coating allows for good heat transfer to the feathers, and the mildly water-repellent finish reduces the chance of the feathers getting wet. The attached fabric for the storage pocket is made of AURORA-TEX®, a nylon fabric treated with NANGA's original porous polyurethane waterproof coating. This material solves the problem of decreasing vapor permeability when waterproofing is increased, and has a two-layer fabric with water pressure resistance of 20,000mm and moisture permeability of 6,000g/m2/24hrs. . The down is filled with white duck down from Spain that has been washed domestically to increase heat retention. The blending ratio is 80% down and 20% feather.