I purchased three bamboo mattress protectors  to cover the bamboo toppers.  A slight rustling noise on opening them out to place on the toppers but they are silent and comfortable when in use and stay in place with no creasing.   The toppers and protectors have been in use for only a few weeks, so to test the fluid repellency of the protector I applied a small amount of water and the cloth underneath remained dry.  Very pleased with the product.