Product DescriptionQuality Park 9 x 12 Bubble Mailers provide a protective cushioning when shipping fragile items. The air filled bubbles inside the mailer help soften the impact of handling while your package is in transit. Features our Redi-StripĀ® closure - no moisture required. Just pull off strip and press to seal. Mailers are made of 47 lb. golden Kraft and packed 10 per box. To make this item even more efficient there are Avery address labels are included in each box. Rest assured you package is protected when you use bubble mailers by Quality Park.From the ManufacturerMailers feature a bubble lining for added protection and convenience. Redi-Strip closure requires no moisture to seal. Simply fold down the flap, press and seal. You"ll have no peel-off strip to throw away. Mailers include Avery mailing labels.