Sea Pearls are completely natural, very absorbent and do not contain dioxin, synthetic fibers or any other harmful chemicals found in ordinary tampons. Sea Pearls are inexpensive, can be reused up to 6-12 months and are high quality sustainably harvested sponges. No more running to the store for emergency tampons. Just wet, insert, remove after 3-4 hours, rinse & repeat. Sponges can be trimmed to fit your unique form so you won't even notice them.