DIY laptop sleeve (temporary)

I'm a crafty guy, so I've decided to make my own laptop cover. It's temporary, b/c this one is just made out of a random piece of flannel ($1.02, taxes included) from Fabricville. I'll see how it fares in the next few days. Already, the flannel gathers dust.

Did this one by hand, first sewing both sides, three times each, and then sowing a four-layered piece of fabric at the bottom. I made it to protect the laptop from dirt and scratch-potent objects in my usual sleeve bag (where I plan to carry my laptop in), but is not strong enough to be held by itself. What'd be nice is a piece of minimalistic cotton one would use for making table cloth (but thicker). Thick synthetic textiles or some padded fabric could be nice - but I could use a sewing machine, which my grandmother has.