AWJ Lining, thick back elastics and hook and loop closure.  Plus a silky PUL material that is waterproof and comfy for your kiddo. 
Sewn in 4 layers of bamboo terry insert plus a pocket for extra absorbency 
Up to 15lbs and the snaps are 2x3 (new additional rise to fit our smallest little ones)
Also available in pockets sizes:
Middlest 7-40 lbs
Maximest Flex (3x5rise) 20-75lbs 
 
**When pairing with 8+ layers expect to size up one rise snap, most babies 20lbs+ using the 5 layer Snake insert prefer Maximest Size**