Ethically harvested natural sea sponges contain enzymes and minerals that help prevent the development of molds, odors, and bacteria. They are also hypoallergenic because they are always naturally processed and contain no artificial ingredients, harsh chemicals, or toxins of any kind. as a result they are softer, more absorbent, lather extremely well, and are not known to cause skin irritation. Additionally, they generally last much longer than synthetic sponges, along with being fully biodegradable, and are actually good for the environment since they are sustainably harvested so that they remain a renewable resource. this listing is for 1 sea sponge 3-4" inches in size.