They have 4 snap down rise setting to fit babies from about 8 lbs through potty learning. They have a varies of outer layers (i.e. interlock knit, cotton woven, and minkee). There a hidden layer of 1 mil PUL and the inner layer is Micro Chamois Fleece (which is very light weight fleece). Since they are doubled end opening, you don't have to worry about pulling out the insert before washing them, which is a definite bonus for those poopy diapers.