So I have tried multiple brands (baleaf, the gym people, chrleisure, naviskin to name a few) and styles of thermal leggings through Amazon and I have found these to be the most comfortable, warmest, thickest and overall best quality. Other brands were thin, see through, had odd seams in the crotch or were just plain uncomfortable and poorly made. For reference, I am 5"4, 170lbs and have a booty. I ordered the lg/xl(and loved them so much I ordered 3 more). These fit like a glove. The waist is comfortable, not too tight or loose. The fabric is thick and hugs my legs instead of strangling them. Maybe best of all, they stay put. I don't find my self constantly pulling them up or adjusting them throughout the day. The are just plain comfortable and Well made. And for those of you interested in multiple pairs, I have a total of 4 pairs now and they all fit and feel the same. Kudos to this company making a solid and consistent product!