I do hot yoga 5 days a week. The studio offers towels to lay over your mat but I am constantly bunching it up. Yogitoes helps solve that problem. It isn't attached to my mat or anything but the little grippies are heavy enough to weigh the towel down. It can bunch up a bit during vinyasa but not too bad. Much better than a plain towel.
Be sure not to wash these with your yoga clothes. The grippies can tear your stuff up.