I have 4 pairs of these! They are unusual in that they are a SUPER stretchy cotton blend, not the usual material most leggings are made of. They are the perfect weight, not too thin, or thick. They keep their color, shape and stay pill free after many washings. Super comfy, they move with you, don’t slide down and look great. I am 5’-5” 130lbs and ordered a Medium and they fit perfectly.