BUILDING SIMPLE SAILS FROM POLYTARP

I'm not sure whether polytarp is a wonder material, but it's a really cheap and simple way of making durable sails for small boats at a price which enables lots of experimentation. (And it comes in a few colours!) Our original sails were Blue, made from the cheapest quality we could find. We managed to get two sails from a $20.00 Tarpaulin sold to cover loads on semi trailers.