I purchased a similar pair of running tights years ago and I love them. I was excited to get another warmer pair, in the same size. I am usually an extra small, but bought a small to be safe, which is what I currently have. The waist was too big and the legs were too tight without much stretch at all. While I loved the style and look, I was very disappointed.
Could be more reflective.
As often happens with me, the garment is too loose in the waist but snug in the thighs- as happened here. I am debating sending back, but.....I do like your concept so .....am pondering!