Yes, what percevial said. I'd also like to add that there are mats made to deal with sweat. Do a search on 'hot yoga mats' to find them. We also wrote an article last fall called 10 Best Yoga Mats of 2017 which analyzes our favorite 10 yoga mats, including which mats are great for sweat and which aren't.
The thing about hot yoga mats is that they generally don't work (they are REALLY slippery) unless the mat is wet or you are sweaty. That is why many choose to go with a non-hot yoga mat and use a rosin bag when they sweat.