Motherease's Toddlease Sandy's fitted as well as their XL AIO both fit 35-45 lbs.
Both have side snaps so they can be used as early trainers as well. At his age/weight, I wouldn't invest in any diapers that won't work as trainers (front snaps, aplix, etc.).
, married to dh for 22 years!
Homeschooling mom to ds17
our 3 1/2 year old potty princess