TPU MATERIAL: Rugged and waterproof, the TPU material will protect your documents from the weather and years of abuse. WELDED SEAMS & JOINTS: The watertight welded seams and joints will protect your paperwork from splashes or a Monsoon! RUST-RESISTANT CLAMP: Use this burly clamp to securely keep your documents in place while in the field. SHEET RETENTION: Work confidently on windy days with your sheets locked down with the elastic sheet-retention strip. TWO ZIPPERS: The welded water-resistant zippers offer a full-range opening for the Command Desk to lay completely flat. PEN HOLDERS & HANG LOOP: Two exterior pen holders keep your writing instruments close. Using the rear hang loop, keep your Command Desk in your office or workspace for easy storage and accessibility. WEBBED HANDLE: Don't lose your grip with a tough back handle designed for extended writing comfort and security.