M-world No Vacuum Required! Garment Vacuum Bags M & L 5 Bags Each/10 Bags Total 5 M bags, 5 L bags Size: M: 11.81 x 15.75 inch; L: 13.78 x 19.69 inch Materials: Bags: nylon & polyethylene; sliders: polypropylene Country of origin: Japan 5 M bags, 5 L bags, 10 sliders Product specifications: Patented triple-layer construction check valve & flat pump