These are my personal favorite leggings; I wear a pair almost every day in the winter. 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 L/XL.

I use these primarily as pants by themselves, but have also used them as a thermal layer under other pants, and they work great for both.