This Nichiban cover film is such a smart solution for protecting your important books, documents, and materials! The B4 size (17.7 inches x 5.9 feet) transparent film has this awesome antibacterial function that's actually SIAA certified and tested according to JIS Z 2801 standards - meaning it actively protects against bacteria while shielding your items from dirt, scratches, and general wear and tear. Made from durable polypropylene material that has excellent weather and aging resistance, this film keeps your protected items looking beautiful forever. The 0.04mm thickness provides solid protection without adding bulk, and the acrylic adhesive ensures it stays in place. What's really handy is that it's repositionable - if you mess up the application, you can immediately reapply it without worrying about wrinkles or ruining the adhesive. The surface can even be wiped clean with regular alcohol spray for maintenance. Perfect for covering children's books and magazines that get heavy use, reinforcing and repairing older books and notebooks, or protecting important documents and prints. The non-laminated renewable release paper makes application smooth and easy. Whether you're a parent protecting school books, a student organizing notes, or someone who wants to preserve important materials, this antibacterial cover film delivers professional-level protection with features you didn't even know you needed!