I love these pants. Sooo comfy and stretchy, perfect for lounging at home. The waistband is stretchy but sits snugly around my waist (67cm) in size XS. I wouldn’t size up though. The material isn’t ultra thin, I feel like it’s just right. It has a brushed finish which feels amazing on the skin. I don’t think i’d wear this to go out, it gives me comfort vibes. Hope this helps. I’m 55kg and 163cm in height.