I impulse bought this jacket at Costco last week and am in love with it. It has thumb holes and the sleeves have the fold over ends to cover your hands completely. Perfect for me since I hate wearing gloves when I run if I can avoid it. It's also nice and long and super warm. I usually wear a medium in workout tops, but I got a large and am glad I did so I can fit another layer under.
I think they run a little big. I'm normally a medium on top and bought it in a small. I love this jacket!!!! My store has it in black, pink, purple and teal
Related... My Costco had Champion brand sweatpants and hoodies. I got one of the hoodies and it might be my favorite hoodie ever made. The hood is double-lined, so it's extra thick, and it has a cowl neck for extra awesomeness. And it's fleece-lined.
DH works next door to a Costco so I told him to buy me one in another color. I have dark gray; I think there was also black, cranberry, teal or blue (DH said navy, I remember teal). It's pretty TTS. I think it was XS-XXL. I got one size up so I can layer.
I have a pair of champion crops from Costco that I would live in if I could. I'm going to be stalking the place soon to see if they come out again and then I'm going to get 50 more pairs.