100 Count, 3.75 Inch x 4.75 Inch Resealable Bamboo Kraft Mailers, Pull Tab, Reusable, 2 Glue Strips,  Self Sealing Kraft Fulfillment Mailers. Made of 160gsm Bamboo Kraft Paper. Make Your Handmade Products Stand Out: Grow market share, increase revenue by promoting brand awareness with truly sustainable packaging made from 100% bamboo that does not contain plastic, wood, wood pulp, or tree byproducts. This product qualifies for Free Shipping in the USA with tracking to all Fifty States.