Description from Knitty.com:

Give the boys a little support while daring to bare!

This sexy men's thong brief covers just the essentials while lounging, sunning, or under clothes while running around.

Cool cotton/elastic yarn, proves it's no longer just for socks with just enough stretch to keep everything together while looking great.

Short rows create the bubble which becomes the pouch of the thong, while keeping the sides close to the body.