The Pearstone Four Filter Pouch (Black) is a padded Cordura nylon pouch made to hold 4 round filters sized from 37 to 82mm. There are 4 mesh pockets to hold the filters. Two will hold filters up to 77mm, and two will hold filters up to 82mm. At the back of the pouch there is an ID sleeve that allows you to mark down which filters are stored inside this pouch.