The Smart Bottom reusable sandwich bags are lined with a pure finish polyester satin, which makes them water resistent without any added chemicals or laminates.
Each bag will easily hold a large sandwich or any other snack you would like to keep clean and fresh for the day. Material Contents 100% Cotton Outer/ 100% Polyester Lining Care Instructions Wash and dry warm. Do not use bleach. Turn wrong side out and wash with your regular laundry.