Natures Child Organic Cotton Breast Pads are fab - you get a few in the pack- and its pretty easy to just chuck them in the wash with everything else. You only need them in the beginning stages of BFding anyways- after a couple of months your supply settles down a bit and your boobs get used to the 'load' - lol.
Just my opinion - but you really don't want to have any synthetic and potentially toxic materials (as most plastics are) against the skin where bub will be feeding. Those types of materials do not breathe either so they can make you sweat. Thick cotton will absorb any leakage and allow your skin to still breathe.