Whenever I’ve heard this before I’ve pictured my husband with a hammer in his hand or a mechanic under the hood of a car. But I never thought that using my ultra-comfy mat for a hot yoga practice was a bad thing. However my experience a couple of months ago, where I slid off my mat (yes slid, as in I was very sweaty) was my go-buy-a-hot-yoga-mat alarm. I purchased my mat over a month ago at the Yoga Show, from B YOGA.
This is from their site (I am doing this review on my own, I purchased the mat, it was not gifted):
B MAT Strong (6mm – 71″), Weight: 5.0lbs
B MAT® Strong offers superior cushioning for the yogi looking for more comfort and support. B MAT® Strong is perfect for those with a higher impact practice, such as Vinyasa, or for those who simply value extra comfort and cushioning during Savasana, Yin or other practices.