I found cotton t-shirts that are big and loose feel best. All of my t-shirts are men's.

I wear Danskin pants. They're uber soft and comfy! I have a couple of pairs of yoga pants I picked up at walgreens that are the same. With the ones I picked up at walgreen's, you have to remember to follow the wash and dry directions on the label or they will shrink! LOLOL I picked up some men's tube socks, in black which is my fav color, and they're soft and comfy. I wear 2 pair on each foot cause it helps cushion my feet and also helps them stay a little warmer.
Hugs,
Karen