These are very comfortable pants. They are so soft that they feel like cotton knit pajamas. The tag states that they are made of 100% cotton, and it must be pima cotton. These are the softest 100% cotton pants that I have ever owned, and I highly recommend these, if you are looking for casual, comfortable, easy-care pants. I did dry them on low in the dryer--although the label says to "line dry"--and they shrank up a little, but not enough to make a big difference in the way that they fit.