From the Logitech blog:
The three keyboard products each feature a built-in Bluetooth keyboard with maximized key size for a fast and fluid typing experience. The Logitech Folio Protective Case offers tablet protection without a keyboard, and is Logitech’s thinnest and lightest folio for the iPad Air. It has a water-repellent skin for two-sided protection against bumps, scratches sand spills, and doubles as a stand, adapting to hold your tablet at the right angle for reading, viewing or playing games.
The FabricSkin Keyboard Folio looks nice. Personally, I’d just love if the old special keys started working again on iOS 7 with my Logitech tablet keyboard.