The product is a set of 15 poly mailer envelopes with a silver inner lining, measuring 12” x 15.5”. These shipping bags are designed for efficient and secure packaging and shipping of items. The poly material provides durability and protection, making it ideal for businesses and individuals needing reliable mailing solutions. * Water proof and tear resistant * Non-transparent white color outside & silver color inner layer * Pressure sensitive sealing adhesive provides durable closure * High strength material allows over-stuffing * Lightweight saves on postage