Heavy wetter?

What is a heavy wetter? Just wondering if Willow is one? She seems to pee a lot. She can soak through a Little Lamb bamboo in an hour or so. I am returning some of my easyfits to be looked at as they leak in under an hour, but I am guessing they are just going to say she wee's too much for them.
Can anyone recommend a nappy for us?

I'm being wow'ed by the triple thickness boosters and squares little lamb do. They are compressed bamboo so they are still slim but ultra absorbent.

Thanks @ems101 I did buy some of the thicker little lamb boosters in their sale. What nappies do you use them with?

I use sized pocket stuffed with a tri fold square and a triple bamboo layer booster. That gets me 3hours , even 4 if he naps for a long time!

Adding a hemp booster to a pocket nappy (I have little lambs too) has worked a treat.
I also really like A Mama Knows nappies with a wrap. They are slim fitting bamboo fitted nappies and I often add a hemp booster between nappy and wrap.