Thompson Center™ Cleaning Patches are made from 100% cotton and are manufactured to have a uniform thickness for consistency in performance.Thompson Center™ Cleaning Patches are made from 100% cotton and are manufactured to have a uniform thickness for consistency in performance. These Thompson Center™ cleaning patches are non-toxic and biodegradable making them a great choice no matter what state you are hunting in. Additionally, these patches come in a package of 250 ensuring you are well stocked on cleaning patches for a great pric