These are soft and thin.  These would be nice under a long shirt, skirt, or dress.  I'm sure I could also wear these under jeans/pants as an extra layer in the winter.  When I tried them on I didn't notice that they were see through.  I don't think that they are.  I will update my review if they are.  These are a basic legging and they washed up nice.  I only put them in the dryer for about five minutes and then laid them out to dry the rest of the way.

**Update** I finally wore these and when I held them up to the light I stretched the fabric and I could see through them.  It's winter right now, so I've been wearing Cuddl duds underneath.  In the summer, I will probably still wear my Cuddl duds or double these up if I wear them solo, if I wear them under a skirt, I won't do that because my butt will be covered.  However, these are super comfy and by far one of my favorite pairs of leggings.