One of the best DIY Infinity dress tutorials I've seen. Uses the extra fabric to make a simple tube-top to wear under the dress for more coverage when the style needs it. Smart! I've seen another version that makes the waistband about 15" tall so it serves as the tube top, but that seems prone to the top getting pulled down by the rest of the dress. I like the idea of it being detached so you can trust it to stay up a bit!
Tricks of the Trade: Convertible Wrap Dress Tutorial!