【Special Color】Light purple makes your package more attractive to customers, making your package more mysterious. 【Super viscous】Hot melt adhesive strip, strong viscosity, once bonded, can only be destructive to open it, improve your package security. 【Durable Protection】Made by six layers membrane，can be streched 3 times longer than normal，keep your product in good condition. 【Waterproof Bags】Waterproof keeps the Gifts as good as new even if they get left out cold in the rain. 【Save Your Time And Shipping Cost】These poly mailer bags are 2 mil thickness for shipping soft-goods, and they are light enough to safe you some money on weight for shipping.