Manduka eKO 5mm Yoga Mat
I am an avid yoga pracititioner, and no mat works better than the Manduka eko mat. It is the widest mat I can find, giving me ample space to practice in class. The mat never moves, so you don't find yourself tripping over your mat while vinyasa-ing. Also, it's entirely eco-friendly and is biodegradable. It should last you about 5 years, so the $65.00 will pay for itself many times over had you instead opted for the $30.00 plastic mats. Namaste.
These are cool. Won't let you slip when your on a ball.