Trimmest, most absorbent prefold?

[rockchikcassie]

I have made my son lots of fleece training pants and I really just don't feel like making the inserts for them lol. They are pockets so I was thinking about just using prefolds. I don't want anything super bulky, I have some indian cotton and they are just too bulky for these. I've made a couple of inserts out of 2 layers of mf and a layer of zorb and they work well, but with 18 hours of school this semester I just don't have the time to make the rest I need. What is the trimmest most absorbent option? I was thinking maybe bamboo or hemp, but I don't know which brand to try.

Thanks for any input!

[A.Fred]

thirsties duo hemp pfs are pretty trim