Telegizmos 365 covers claim to be the cover for year long use
http://www.telegizmos.com/365%20size...20page%202.htm
For me, I use an old towel and an old folded up bedsheet as insulation and protection of the scope cover the lot with a heavy duty silver tarp tied around the base.
Once I take off the scope, I leave the mount on the pier and use the same towel/sheet insulation with a thinner/smaller tarp and an upside turned bin on top.
Bo