Bimini tops are going on 5 years old (will be five years this December, but have been through 5 summers) Florida sun, salt, and bird poop are taking their toll. I have removed the biminis to have a local marine awning shop inspect, and replace if necessary. I hope to get another year out of them, but not sure they can survive. Present material is Sunbrela. Talking with the shop, he suggest that I consider three sources for replacement: Sunbrela Supreme Stamoid Haartz (Sunbrela with "special engineered coating") What success have the members had with these or other fabrics. Replacement tops are not exactly cheap, I would like to get more than five years before replacement. Chet DeFever 44+5, Cygnet Daytona Beach, FL