Sunbrella or alike acrylic Fabrics ?
Sure Sunbrella is the best marine fabric for a lot of other applications , but I think for a Winter cover this very pricy fabric is not very good in defeating the constant attack by heavy rains and sometime snow, the chemical which results in the water repellency has to be reapplied and further this fabric is not very good at abrasion which happens quite often since we have severe winter storms.. The fabric I use is a 600 denier (very strong thread) solution dyed Polyester with a Polyurethane coating on the inside.. I try to get material where the coating is just right so that it still can breathe and at the same times sufficient waterproof.