Project bridesmaid

I need to find a yellow dress to wear in an April wedding in Jamaica. This is great news, as I love yellow, and can pick out any dress I like. Now, I already have a nearly perfect vintage yellow dress from the 60s or 70s that I found at a thrift store a couple years ago. The problem is that it's a thick knit polyester that is absolutely sweltering to wear in any sort of heat...probably not the best choice for a Jamaican summer.Back to the drawing board, I found a couple potentially cute looki