I just made a long "aisle runner" type rug for my sewing room a couple days ago! I used canvas duck cloth for the back and outdoor (Sunbrella type) fabric for the top. I used scraps of polyester batting for the inside and quilted it all together with straight lines. The binding is just the canvas duck brought around from the back. It's too big to ever fit into my washing machine; I intend to spot-wash it when it gets dirty but it's quilted thoroughly enough that it could theoretically go into a jumbo washing machine. It fills the main walkway of my sewing room, which is also my living room, so it will get a fair bit of traffic.
It IS a little bit slippy, so I intend to buy some rubberized mesh for the back - I will probably be lazy and just glue that on.
I really like my new rug, but my DH is afraid to step on it and keeps going around it, LOL.