My dog had a sheepskin rug that lasted him pretty much all his life. Even with rough play and him using it camping too. Washed in the washing machine fine and didn't smell as much as the synthetic ones.
You can pick them up pretty cheaply from the likes of Ikea though mine was a charity shop find. Also rolled up nicely for when we were traveling. Could even attatch it to his paniers so he could carry it and not me.
Sent via smoke-signal from a woodland in Scotland.