4 Pack Most sponges are designed to be thrown out and contain plastic materials that are harmful to our planet. Our notplastic™ sponges can be machine washed and reused. Think of them as a blend between a dish cloth and a sponge. Won't stink upThe plant fibres used to make this sponge are naturally anti-microbial, so you can count on a no smell sponge. No one likes a stinky sponge - yuck! Made from cotton and bamboo fibresThe printed top is made from cotton and the bottom is made from bamboo. Machine wash & dishwasher safeThrow them in the washing machine or your dishwasher once per week to sanitize.