Hi sozzeled,
I don’t have any personal experience with it and hadn’t noticed it before but since you’ve mentioned it I’ve added it to the list of options for puddle pads in the mattress protector reference post here.
I would keep in mind that different types of puddle pads can have different densities of wool and different degrees of water resistance (they aren’t "waterproof) so I would talk to them about the thickness/density and how water resistant it is to help you decide whether it would be a suitable choice for your child.
Phoenix