Fold-a-Cover Tonneau Covers add convenience, security, and great cargo management.  Fold-a-Cover has all the advantages of a great Tonneau Cover and none of the hassles.  Here are a few:

• Durable Construction
• Opens in seconds
• Exclusive Slam-Lock latch system (Locks both tailgate and Tonneau Cover)
• Bitted Key (for extra security)
• Attractive, low profile, aerodynamic design
• Light-weight, durable aluminum and stainless steel construction
• Weather, rust, and corrosion resistant
• Patented 4 panel design and mounting system
• Specially designed to accommodate fifth-wheel trailer
• Travels safely in stacked or closed position
• Improves gas mileage by at least 10%...up to 15%
• Allows easy access to all cargo
• Neutral black finish

See http://www.foldacover.com for more info.