A filter bag comprising: a body (16; 116) comprising a bag opening (12; 112; 312) and a closed end, the body (16; 116) extending from the bag opening (12; 112; 312) to the closed end along a bag axis (11; 111; 311) extending between the bag opening (12; 112; 312) to the closed end, wherein the body (16; 116) comprises filter media forming a tubular shape between the bag opening (12; 112; 312) and the closed end; a sealing cuff (30; 130; 330) attached to the filter media forming the tubular shape of the body (16; 116), characterized in that the sealing cuff (30; 130; 330) is attached to an interior surface of the filter media proximate the bag opening (12; 112; 312), the sealing cuff (30; 130; 330) extending around an entire perimeter of the bag opening (12; 112; 312); and in that the filter bag further comprises: a fitting cuff (20; 120; 320) positioned on the filter media forming the tubular shape, the fitting cuff (20; 120; 320) located between the sealing cuff (30; 130; 330) and the closed end, the fitting cuff (20; 120; 320) positioned on an exterior surface of the filter media; wherein the filter media forming the body (16; 116) between the sealing cuff (30; 130; 330) and the fitting cuff (20; 120; 320) is configured to be folded such that a fitting pocket is formed in the filter media between the sealing cuff (30; 130; 330) and the fitting cuff (20; 120; 320), wherein the fitting cuff (20; 120; 320) is located in the fitting pocket and the sealing cuff (30; 130; 330) is located outside of the fitting pocket, and wherein, when moving along the bag axis (11; 111; 311) away from the closed end, the bag opening (12; 112; 312) is positioned between the fitting cuff (20; 120; 320) and the closed end of the body (16; 116) after the fitting pocket is formed. a body (16; 116) comprising a bag opening (12; 112; 312) and a closed end, the body (16; 116) extending from the bag opening (12; 112; 312) to the closed end along a bag axis (11; 111; 311) extending between the bag opening (12; 112; 312) to the closed end, wherein the body (16; 116) comprises filter media forming a tubular shape between the bag opening (12; 112; 312) and the closed end; a sealing cuff (30; 130; 330) attached to the filter media forming the tubular shape of the body (16; 116), characterized in that the sealing cuff (30; 130; 330) is attached to an interior surface of the filter media proximate the bag opening (12; 112; 312), the sealing cuff (30; 130; 330) extending around an entire perimeter of the bag opening (12; 112; 312); a fitting cuff (20; 120; 320) positioned on the filter media forming the tubular shape, the fitting cuff (20; 120; 320) located between the sealing cuff (30; 130; 330) and the closed end, the fitting cuff (20; 120; 320) positioned on an exterior surface of the filter media; wherein the filter media forming the body (16; 116) between the sealing cuff (30; 130; 330) and the fitting cuff (20; 120; 320) is configured to be folded such that a fitting pocket is formed in the filter media between the sealing cuff (30; 130; 330) and the fitting cuff (20; 120; 320), wherein the fitting cuff (20; 120; 320) is located in the fitting pocket and the sealing cuff (30; 130; 330) is located outside of the fitting pocket, and wherein, when moving along the bag axis (11; 111; 311) away from the closed end, the bag opening (12; 112; 312) is positioned between the fitting cuff (20; 120; 320) and the closed end of the body (16; 116) after the fitting pocket is formed. <EOS>