These are a light-weight cover-up.  I hoped they were a little thicker, but they aren''t.  They are thin.  With that said, my girls (ages 8y & 9y) really like them.  They provide the modesty I desire when going to/from swim team practice (and swim parties).  My girls tell me the cover-ups keep them warm after practice, and are easy to get off & on (especially when the girls are still a little wet).  The back of the cover-up is a little longer than the front to cover their tushies and give them something to sit on.