The baby blue pocket diaper is a Snap-EZ diaper and is a size XL. It has snaps in the front to accomodate 3 different settings for width, a soft inner layer, elastic no-gap leg bands, and a very wide pocket opening in the back to put in absorbent inserts. The black diaper is an unbranded Chinese-made diaper, but is actually a superior product - this might be an Ecoable diaper, but I can't find any labeling on it, so the Ecoable might still be floating around the house somewhere. Anyways, this features adjustments for both width and rise and is one-size-fits-all. Again, soft inner layer, but a narrower pocket in the back and double-gusset legs. The Alva insert is a super-absorbent charcoal microfiber insert. It is designed to be used with toddler-sized diapers.