Amazon.com: Microsoft Type Cover for Surface Pro – Black …

And the keys were cramped, making me feel like I was typing on a laptop from 2007 and the cover itself was slightly bendy when typing, however I thought this was a minor tradeoff for having such a slim form factor. The surface pro 4 type cover solves these minor issues while keeping it’s original footprint. Gone is the small, useless trackpad.

https://www.amazon.com/Microsoft-Type-Cover-Surface-Pro/dp/B0163H1HT6