Abstract: A sack for compressing compressible material contained therein, the sack including: a pliable body portion (20) for receiving the material, the body portion having a lower base portion (22), wall means (21) and an upper opening (23) for introducing the material into the sack and removing it therefrom; cover means (28) exterior to the body portion and fixed thereto proximate the opening and having cover fastening means (29, 30, 31, 32) for releasably fastening to the body portion proximate the base whereby the cover means covers the opening, and a plurality of straps (25, 26) and/or connectors exterior to the body portion and attached thereto; wherein the cover fastening means and the plurality of straps and/or connectors are operable to compress material in the body portion.