These seem like very high quality for the price, are very stretchy, cute and comfortable. They're soft on the inside and nice and long -- I'm almost 6 feet tall and these fit perfectly. These aren't super warm so just be careful. You could run in them in like 35 or 40 degree weather probably, but they wouldn't be warm enough to walk in temps like that. But that's not why I bought them and not what they're intended for. Buy the fleece lined leggings if you want something very warm for going outside in the cold. (Or just buy them because they're super comfy and cute too!)
I really like this brand and own a lot of clothing of theirs now (like 15 pairs of leggings, 4 tops, some shorts etc). I wanted these to be a little loose honestly so I went up a size. All of my other pants are Larges but I bought an XL and like it. I think a Large would have fit fine but would have been tighter.
I don't get anything for writing this review btw, I'm a real person with a real job who likes writing reviews to try and be helpful and counter the trend of fake reviews. I paid full price for these because I wanted them. Let me know if you have any questions!