Heat has been my biggest issue too during workouts. I recently tried some items from Qynda's cooling fabric line and it's made a noticeable difference. They use this special cooling material that feels refreshingly cool against the skin even when you're moving a lot, plus the pieces are designed with modesty in mind — longer sleeves available, non-see-through, good length on tops. I wore one of their cooling tops during a hot yoga session and didn't feel like I was melting. Check out their cooling collection here if you're dealing with the same problem https://qynda.com/collections/cooling-fabric — it's been a lifesaver for me in this weather.