This was recommended to me by my yoga teacher...very useful if you practice Ashtanga or other "vinyasa flow" (i.e. sweaty!) yoga. It's the exact size of a standard yoga mat, it doesn't bunch up and trip me when I'm trying to jump through, and it absolutely stops my hands and feet from slipping. Plus, it folds up a lot smaller than a blanket and is easier to fit in a mat bag. It's kind of spendy, but worth it if you practice regularly. Highly recommended. 5 stars

I was so frustrated with those so called "sticky mats", my hands would slide forward in simple poses like downward facing dog.
So I decided to give the $50 skidless yoga towel a try.
This worked pretty well for my slipping hands, but i had a new problem. I was unable to get traction for my feet and felt as though they would slip up when in many of the commonly practiced poses in yoga. (downward facing dog, even poses like triangle and extended side angle). I really tried giving this towel a chance but ended up purchasing a harmony yoga mat (those rubber mats) which greatly reduced my slippery yoga experiences.
I would not recommend the skidless towel for your entire mat, maybe you may have better luck with just the hand towel.
I realized with yoga mats that every person is different, so what doesn't work for me, may work for you. I just thought I would give my 2 cents. 2 stars

It can be just a bit slippy at first but as soon as you sweat it gives you good grip. Expensive for a towel but I love all the colors - end up getting more from BargainYoga for much less. Don't forget to wash twice before use. The color will bleed so don't mix with other clothes. Also don't overload the dryer with a SKIDLESS inside. It will make horrible noises because of the nubs. (I fired the cleaning lady afterwards.) 5 stars

I have this in pink, which was only made for October 2005, for Breast Cancer Awareness month. I love the color of mine. I considered buying one for quite a while, but didn't like the chakra color selection. I wanted something more pastel, so fortunately I was shopping for it in October. Current color selection is a minus.

This towel is really good for controlling slippage in my hands, but not my feet. My feet seem to slip more than usual, so I don't use this towel frequently. It seems to work better when I am sweating more. I also have a theory that fabric softener may make it more slippery, but that's just a theory.

It's also a bit of a pain to deal with when moving into poses where I need to move or fold the mat.

Currently my mat is on it's last legs, so it helps helps keep me from getting little chunks of mat all over myself while I find the perfect mat to replace it. It's good for extending the life of your mat. 3 stars

After sweating and slipping in many a vinyasa class (even on a "non-slip" mat), a friend recommended this yoga towel. This product has saved my yoga practice! It does take one or two classes to get used to, but once you do, you are off to non-slip yoga bliss. Plus, the well-placed circle at the top of the mat gives you a visual to focus on to stay centered. Thank you Yogitoes! 5 stars