Logitech's latest portable keyboard for tablets has a built-in cover
The latest portable keyboard from Logitech has its own cover to keep it protected in your bag.

Tablets are great until you want to actually do work on them. Then you need a keyboard. Logitech's Keys-To-Go 2 is an ultra-portable wireless keyboard designed for tablets, though it will also work with mobiles and laptops.
You can pair the keyboard with up to three different devices over Bluetooth, and seamlessly switch between them with easy switch keys.
The integrated cover helps protect the keyboard while you carry it around, and the keyboard's plastic parts include certified post-consumer recycled plastic. There's up to 36% recycled plastic for the pale grey and graphite models and up to 33% for lilac.