Self seal air cushioning mailers. Features an Astro-Cell® air cushioning liner that adds the right amount of cushioning and surface protection when mailing items susceptible to impact and abrasion during transit. Out-performs other air cushioned shippers in puncture testing. Fin bottom and sides. Excellent impact resistance and added edge protection. Convenient self-seal closure with paper-release liner. Easy-to-use, secure closure. Courier Friendly™ cases are sized to optimize couriers' standard rates (UPS, FedEx, DHL, etc.) Reduces outbound shipping costs, increases warehouse efficiency.