OKAY THIS CLASS WAS HOT AND SWEATYYYY but im telling you the get low set that everyone thinks is sheer and see through upheld for this temp my sweat wicked like no other and was “dry” for the most part and my 3in mat is my tried and true I was sticking not slipping during this class and it was amazing !!! So yes you need this and I would do true to size in top! LTKfitnessgoals LTKActive LTKdayinmylife