The outer layer of this White Poly Bubble Mailer is covered with a pearlescent film, Can effectively waterproof. The biggest feature of the pearlescent film is that it has a certain degree of elasticity and is not easily damaged by external forces. The inner layer has sufficient air bubbles to better protect you Items. Usually used for express bags, jewelry bags and clothing, etc. Because the price uses sea freight far lower than air freight for white poly bubble mailer , so we recommend that you use sea freight. Customize these bags with your company name and logo for an eye-catching presentation. 12 1/2"W x 11 1/16"H