I was thinking after reading a post the other day about what to wear when it heats up. I am currently running in cropped leggings (well actually my scapri but basically leggings) and a short sleeved tshirt. Not sure I could wear much less than that but temperatures were up to the late 30s here last summer and I don't fancy trying to run when it is that hot. I did see one girl out running in just a sports bra and legging but don't think I could manage that one although she looked great and perfectly at ease.
What are you wearing when it hots up?