Pajak is a Polish, family-run company that specializes in the production of down products, manufacturing its small but exquisite range exclusively in Poland. The Core 400 is a comfortably cut, lightweight three-season sleeping bag. With a comfort range of 0 °C to -6 °C, the Core is most at home from spring to autumn and can also be used in winter when combined with a warm liner or a second sleeping bag. The lightweight thermal powerhouse is based on a very light and robust outer material combined with high-quality duck down with excellent loft. The material's very good compressibility results in a pleasantly small pack size. The chamber construction with slanted chambers reliably prevents cold spots. The smooth-running 2-way zipper is positioned on the top rather than the side, making it easily accessible for both hands. A pinch protection and a padded cover strip ensure warmth and perfect handling. The snug-fitting hood is supported by an internal thermal drawcord at shoulder height, preventing heat from escaping from head to toe unless explicitly desired. The material at the head and foot areas is waterproof. An inner pocket and loops for hanging and airing out complete the Core 400, which is available in various lengths.