canvas, canvas, canvas
Ray:About 4 years ago I had a custom canvas (boat duck canvas) cut for my 28 foot O'day. It is cut in such a way that I can put it on with the mast up and all rigging in place. I have a 2x6 ridge pole which extend forward to the bow and rests on a vertical support at the mast and on the bow tip which supports the area forward of the mast and the boom which supports the aft portion of the canvas. One person can do it even on a windy day, it is repairable if ripped, doesn't chafe the gel-coat, can be properly snugged so it doesn't flap and breathes well. There are many advantages and the builder said it will last 10 to 15 years depending on how it is cared for.It cost $1500 with most of that being the labor to have it measured and fitted. The next one will use the old one as a template and will be a bit less expensive.I am very satisfied with the cover and would do it again. I did shrink wrap for a while and while I liked the total water proofness of it I had some problems with it. It is hard to install on a windy day, it does not breathe and the expense is fairly high and annual.Your call and good luck