Everyone knows that a good blueprint is the most important part of any project. You can protect your blueprints from rough handling and the elements as you send them in these sturdy blueprint shipping bags. Made by combining the strongest polyethylene available, the .004 mil. bags are not-only impervious to weather, but they are also easy to mark by using a simple black marker or conventional ink pen. Self-adhesive labels cling to these bags, meaning that you don't have to worry about label slippage or loss. The Alvin Blueprint Ship Bag 13X46In - 100 pcs is the most economical way to mail, UPS or FedEx those all-important blueprints.