The large document protectors are heavy duty .13 mil thick vinyl envelopes with a waterproof zip top to protect blueprints, charts, maps and other valuable papers from dirt, dust, and moisture. They are great for commercial and marine applications. Write notes with grease pencil or water-based felt pen on the translucent vinyl covers that wipes clean with a dry cloth or soap and water.
The document protectors are listed by inside dimension and sold individually. Volume discounts are available.