Q: What liner or insert would you recommend for a boy who's a heavy wetter?
Little boys tend to present a challenge when it comes to cloth diapering as they wet right up near the front of the diaper. So what tends to happen is that they'll fully saturate the front of your insert before it has a chance to channel the liquid down the rest of the fabric, and you'll often get spillage simply because of this fact. So adding absorbency right up front where you need it is the solution!
Have you tried the boy fold? If not, what you'll do it lie one down so it's the long way, and fold one end about an inch down. Then fold from side to side in thirds, as usual. You'll have a thicker bunch at the front, which should be pushed into the top of the pocket, or laid towards the front if you're not stuffing. Sometimes this fold alone can make a HUGE difference for little boys.
Alternately, you can use some of our boosters and simply fold them in half and place them up near his wet zone in front.
We do have a 3-layer insert but it tends to make the diaper really bulky so we don't often recommend them for smaller babies for daytime use.