portable file box

Portable file boxes are made from a mix of textiles and hard materials. Common materials in these listings include polyester and other fabrics, various plastics, steel, and paper/cardboard. Some fireproof models use a double-layer silicone-coated fiberglass shell with polypropylene (PP) inner support.

Availability varies by model. Several listings explicitly accommodate letter-size files, and some state they fit both letter and legal-size folders. Check each product’s specifications to confirm supported file sizes before purchasing.

Some listings explicitly describe fireproof or water-resistant designs; a few specify a double-layer silicone-coated fiberglass exterior (with PP support) and note fire-resistance ratings and water resistance. Other listings describe plastic, steel, or woven boxes that do not claim fire- or water-resistance. Always check the product details and manufacturer specifications for exact ratings and test standards.