Thirsties NAIOs have been my favorite diaper ever since I got a few preloved when my daughter was about 8 months old, and she's almost 2 now. They are SO absorbent and have fit her so well and so trimly for these 18 months, and they keep coming up with the cutest prints so i keep buying more! They take forever to dry but it's worth it for how much pee they can take. They do stain somewhat easily, but the sun takes the stains right out. They are definitely a smaller-fitting AIO because we are on the second-to-last snaps at about 27 lbs, but I think they will last us a few more months until we potty train. I love them!