Black poly bubble mailers, which are padded, cushioned envelopes used for shipping and protection. These mailers feature a self-seal adhesive closure and a bubble lining to protect contents from shock, moisture, and tearing. Material: Multi-layered polyethylene (poly). Key Features: Waterproof, tear-resistant, and lightweight to keep shipping costs low. Measures: 6″ W × 9″ H Quantity: 15 Pieces Stock # NB02