The alternative for ziplocks or plastic sandwich bags. This wrap is made from organic cotton & waterproof PUL, is reusable & can be machine washed on low heat. (Dryer not recommended). the measurements are 13,5 inch X 13,5 Inch. It can fit up to 4 sandwiches. The outside is made from 100% organic cotton & the inside is made from PUL, this means that it is waterproof but the fabric still breathes. Both fabrics are Oeko-tex 100 approved, the outside cotton is also GOTS approved. Organic Sandwich Bag, Reusable Bag , Washable Wrap, Zero Waste, Eco Friendly