Five different sizes There are 5 different sizes to choose from. From medium to largest, suit for packing clothes, clothes, jackets, sweaters, shirts, small backpacks, handbags, purses, shoes and books.Absolute confidentiality These mailing bags were white on the outside and black on the inside. Maturity, strong viscosity, improve your parcel security.Durable protectionThis type of mailer made by six layers of membrane, can be stretched 3 times longer than normal, keep your product in good condition.Waterproof BagsWaterproof poly mailers will keep your gifts as good as new, even if they are left outside in the rain or shine.Save Your Shipping CostsThese poly mailer bags are 2 mils thick for shipping soft goods, and they're light enough to save you some money on weight for shipping.