Survivor® 12 x 15-1/2 DuPont Tyvek First Class Border Catalog Mailer

First Class Mail - #15 1/2 - 12" Width x 15 1/2" Length - 14 lb - Peel & Seal - White - Tyvek - 100 / Box. Made with durable yet lightweight, 14 lb. DuPont Tyvek that's tough enough to resist punctures, tears, moisture and chemicals for long-lasting performance. Release strip so the recipient can easily access the contents yet maintain a secure close.