I have the best Amazon find for you all! This Amazon lululemon swiftly tech look for less top is amazing!! I first found it last year and wrote a blog post on it here. Since then it has been one of my all time best selling pieces. I recently ordered two more colors, and I love it just as much if not more!
Amazon lululemon Swiftly Tech Top Look for Less Details
As for the details on the top, I have the XS, small, and medium now in the blue, peach pink, and royal purple. I originally bought the XS last year, and it is very fitted. This year I snagged the small in the purple and the medium in the pink as that was the only size available. To be honest, I think I like the medium best. You can tell it is looser than the other two, so it is totally just how you prefer your workout tops.
I would also say this is more similar to the lululemon race length option as opposed to the longer original option. For reference, I normally wear a size 6 at lululemon. The material is really similar. Maybe slightly thicker. You can see a close up on my reel here.