Alvin vinyl sheet protector envelopes are heavyweight .010" thick vinyl and waterproof. Document sleeves feature zip-top closure protects valuable documents from dirt, dust, and moisture. Heat-sealed edges with zip-locking top. Reinforced holes on both long sides for hanging. Great for commercial or marine applications. Notations can be made on these translucent vinyl sheet protectors by using a grease pencil or water-based felt pen. Blueprint protectors wipe clean with either a dry cloth or soap and water. Perfect document protectors for business, contractors, architects, sports, pilots, surveyors, engineers, builders, navigators, artists and more. PACKAGE OF 1 SHEET PROTECTOR. Available in 5 popular sizes. DIMENSIONS SHOWN BELOW INDICATE CONTENT SIZE. Alvin translucent vinyl document protectors are made in the USA.