Pajak is a Polish, family-owned 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 goose 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 with either hand. A pinch guard and a padded cover strip ensure warmth and perfect handling. The snug-fitting hood is supported by an internal heat drawcord at shoulder height, preventing any warmth from escaping from head to toe unless explicitly desired. The color-contrasting 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.