These nursing pads are breathably absorbent without being too bulky, and do not contain a water-barrier. Many sources advise that a breathable, non-waterproof pad is best for preventing thrush and other infections and irritations. The pads are made without the typical tuck, which allows the pads to lie smoother against your skin.
Juniperseed mercantile brand: these nursing pads are made out of two layers of thick, soft and absorbent organic bamboo and cotton fleece, with the smooth side facing your skin.  No gussets, so they lie nice and smooth against the skin without puckering.  These do not have a waterproof barrier, so they are breathable and cool. They measure a big 5 inches in diameter for great coverage! Comes in a set of 4 pads.