Canvas winter covers are expensive and rot out in about 10 years (Quoted
C$1400 for a 36x22). Cheap woven plastic tarps wear out in a year or two
(Can buy similar size for C$100 - $200)

Has anyone used any other type of cover? One would think that here would be
some type of synthetic fabric that would outlast canvas yet still have it's
weight and abrasion resistance.