Made of quality food grade nylon, stain and smell resistant, durable and reusable. Designed a wide opening, universally fits over most jug, jar, food processor or blender for easy filling; Easy-pull drawstring ensures no spill and quick clean up. Fine mesh holes can easily remove the grains and partial mash brewing, make the rest of your brew and cleanup a breeze, no particulates, debris or solids. This set of muslin straining bag includes different sizes, the large straining bag can be used as the wine-making straining bag and beer brewing bag. The smaller food strainer bag can be used as jam muslin bag, nut milk bag strainer, jam muslin bag. This brew in a bag makes a fantastic gift for people who love to make homebrew.Save time and money versus traditional mash tuns when All-Grain brewing.