Some document safes are both fire‑resistant and water‑resistant. Higher‑end models use a double‑layer, silicone‑coated fiberglass exterior (with internal support) designed to protect contents from extreme heat and moisture — one example lists a heat tolerance up to 2000°F. Protection levels vary by model, so check the product specifications for exact fire and water ratings.
Many boxes include built‑in top or internal rails that accept hanging file folders. Most commonly these rails are sized for letter‑size hanging folders; some products may also support legal size—check the product listing for explicit letter vs. legal compatibility.
Common materials include polyester fabric, plastic, steel, and paper/cardboard. Fireproof models use specialized construction such as an exterior double‑layer silicone‑coated fiberglass with internal polypropylene (PP) support.
Internal organization varies but commonly includes multiple pockets and mesh pouches (passport‑size and larger), card slots, USB/U‑disk pockets, outer and main file pockets, in‑lid compartments, label papers, and internal rails or file pockets for hanging folders.
Capacity varies by product. Some listings provide explicit volume ratings (examples include 22‑quart and 55‑quart models), while others describe a large or double‑layer capacity suitable for holding multiple files and organizers. Refer to each product’s specifications for exact capacity.