I had a set of Coptercovers for my last machine and although they are very expensive, they are very good & fold up really small.
The Machine I have now came with lined Cambrai covers, look very nice & brand new but they are huge and just fit into a bag about 18" diameter by 3' tall, I can't see me ever taking them away but they would be Ok if its left out at night at home. Problem is trying to get them on by yourself.