I’ve only been doing hot yoga for 7 months, but I got this Gaiam mat and it is truly non slip. I can see my sweat drops absorb into the mat. The only issue I have is remembering to hang it in the basement to dry between classes. If I don’t let it dry, it is slippery in my next class.

Gaiam Yoga Mat - Premium 5mm Dry-Grip Thick Non Slip Exercise & Fitness Mat for Hot Yoga, Pilates & Floor Workouts (68" or 78"L x 24" or 26"W x 5mm) https://www.amazon.com/Gaiam-Yoga-Mat-Dry-Grip-Exercise/dp/B081W7NJR1