My husband plays tennis, and requested a tennis vest like Jimmy Connors used to wear. I found a picture in an old book, and used Barbara Walker's sleeveless sweater instructions from Knitting From the Top to design this vest. It is seamless, knit from the top from a provisional cast-on. The yarn is Cascade 220 Superwash. I was a little disappointed with the yarn because the deep blue bled onto the white when I blocked it, but overall it's turned out pretty well. Here's a pic of my hubby in his vest, and one of the model (2nd photo).