Mesh fabric Light Weight--18in x 54in. 25 oz per sq. ft. 100% polyester and specially coated to be less slippery and easy to sew. Terrific for pockets, on bags or anywhere you want to be able to see what you are storing. 100% polyester and has a color fastness/staining rating of 4.5 out of 5. It is therefore very resistant and should not emit any toxic items under normal use. That said, we would always recommend using something like Tupperware or plastic bags for actual food, as they are likely to be more hygienic over the long run. The customer would find it difficult to get the mesh fabric perfectly clean, as it is slightly porous.