A couple thoughts:
Did you buy them new or used? If used, you may want to do a couple of washes with only hot water to make sure there is no detergent residue on them.
Also, fleece will appear to repell water when you dribble water on it. But, if you have something absorbant behind the fleece (cotton, hemp ...), the water will wick through the fleece and get absorbed underneath.
Have you tried them on your little one yet? What are you planning on stuffing them with? Personally, I would stuff one and put it on and see how they go ... most often once they are one, the fleece is pressed up against your child's skin, and there is something absorbant underneath, they will wick through just right and leave your little one feeling dry.
We've used Fuzzi Bunz off and on (still do with my older son at night), so if you have any questions, please ask.