If you're going to the beach or pool, and are wearing a swimsuit, at least have a plunge! Yes, our swimsuit can be worn underwater and will still hold the blood inside. We used the same great technology from our underwear to make the swimsuit absorbant, and we added a special waterproof property so the blood is trapped inside and won't leak out in the water! If you have a heavy flow, they might not be able to absorb more after swimming so we do recommend changing it after bathing.