100 Mailing Bags Poly Self Seal Postal Bag 9''x12'' (229 x 305mm) Postage Bags Parcel Bag Plastic Bags Assorted Mailers Posting Shipping Post Parcel Package BagsTamper Proof and Ship Items ConfidentiallyOur NefLaca postage mailing bags are tamper proof recyclable plastic poly mailers that ensure your packages remain secure and untampered till they reach their destination safely. This further helps ensure quality control, and prevents contamination and loss of goods in transit due to either theft or pilferage. Opaque material ensures safe and secure packaging, making it best for business and personal use