This was my one of my very first projects, and I've received tons of compliments on it over the years. The bag and strap are from a pattern. I added the pocket myself. Knitting is very stretchy, so I reinforced the bag by running a length of webbing through the handle and attaching it all the way up the inside of the bag...so the webbing makes a complete loop. This makes the bag much sturdier. It is great to through over your shoulders when you bike to yoga class.
Pattern: "Yoga Mat Bag!" from countryturtle.com
Yarn: Noro Kochoran