FixmattiWomen's 2 Piece Outfits Long Sleeve Pullover Sweatshirt Jogger Pants Sweatsuit

I'm 5'7 135 pounds. I typically wear a small bottom and medium top as i am larger in the chest. What size would you recommend? Not tight or too baggy

How do I contact seller? I only received the top, no pants.

Is the drawstring on the pants real or fake?

is this warm enough for 40 degree weather? And can I bleach the white one? Going to the festival of colors and it might need some attention afterwards