Ooh, I just bought new clothes today!
I was doing thermal underwear, hoodie, and a pair of black lounge/pj pants :/ its all I had and it worked. (I dont go to the gym-- I walk/jog/run in the mornings and lately it's been about 29F outside).
Today I just bought a pair of soft black cotton pants (perhaps yoga pants) and a zip-up Adidas hoodie. I normally wear plain t-shirts or tank tops underneath. And I couldn't do any exercise without my sports bras! I welcome the uniboob... its the only way to tame them!