qualidyne Women’s Sleeveless Cycling Base Layer, Breathable Quick-Dry Bike Undershirt Tank for Under Jersey, Road MTB Indoor Trainer

I will never not take the opportunity to plug mesh base layers when given the opportunity! Staying cool is all about staying dry. The holes in a mesh layer will manage the moisture better than any solid material, no matter what "cooling tech" is marketed in solid synthetic bae layers. This video explains it (it keeps you both cool/warm in all environments): https://youtu.be/dLo2D-J-8nk Some cheap knockoffs on Amazon: Women: https://a.co/d/0dgAyh8H Men: https://a.co/d/03oibg6F I'm a guy so I've only tried the men's brand linked above, so I'm not sure how the women's version will work. There are long-sleeve versions, but with scrubs you'd probably want to wear a tank top/sleeveless mesh base layer paired with a solid compression arm sleeve. I think somebody linked to a good pair in another comment.