These are my personal second favorite leggings. I like the fur lined ones better for winter and the regular thin ones for summer, but these work really well for spring and fall when the seasons are just starting to cool down or warm up. They are also really nice for using as a thermal layer under other pants, as they're warm but not so thick as to make your other pants really tight. They are very stretchy and comfortable, great for lounging around or exercising, either way. I've worn them doing yoga myself, and they allow for full range of motion without binding at any seams. I am a larger-bootied lady and I do fit into the "one size".