American Apparel cotton/spandex leggings are some of my favorites. Thick enough where they are not transparent but not too thick. Super soft, comfortable, various colors, they have that nice high waist so they don't slide down when bending over or anything. High quality, like that they are made in the U.S. so sweatshop-free and fair wages (despite the fact that Dov Charney, founder of American Apparel seems to be a bit of a pervert)... as a serious yoga practitioner who lives in spandex leggings, I love these because I can wear them teaching all day and then put on a nice long flowing top and boots to go out at night. Highly recommended.