I have one I got through the Hobie catalog for my 18. I can't imagine much variation in design - it's just a long piece of Sunbrella with a long zipper, and grommets at either end to secure it. I thought about making my own, but I figured once I bought the cloth, zipper, and did the sewing, it was more cost-effective to just buy one.



I used it for awhile, it's pretty nice and easy to use. Once I got a new jib, however, I've been removing the sail each time instead of leaving it furled on the boat.