If you care sandwich bags are made in sweden from the unbleached pulp of scandinavian spruce trees ndash a natural renewable resource if you care sandwich and snack bags are greaseproof and provide a natural barrier which prevents grease or fat from penetrating they are not treated with petroleum based paraffin wax or any other wax like all if you care paper products these sandwich and snack bags are totally chlorine free as a result of which no chlorine is dumped into lakes rivers an