yoga mat that is thick and non slip

I've been using a Winsor Pilates mat for yoga. It seems a little thicker than the others. It doesn't seem too slippery and I even use it for hot yoga. I bought it a few years ago, but I think it was a lot less expensive than a yoga mat.

The thick ones are usually more expensive. They're nice for when you're on the floor but they make balance postures harder. A yoga mat towel or yoga socks might help with the slippery feet.
http://www.gaiam.com/s/gaiam/toeless-yoga-socks/05-59203.html?code=PS20FST100&extcmp=cse_froogle?device={device}&network={network}&matchtype={matchtype}&creative=28114830669&adpos={adposition}&gclid=CPyvzYnKk7wCFas9QgodK0IAiA