Chlorination of our water supplies is one of the great 20th century public health stories. A disinfectant, chlorine destroys bacteria. But science has brought awareness of the biome, and now we know we shouldn't kill the bacteria on healthy skin and hair of people or pets. This simple-to-use filter gets rid of the chlorine in the bath water, making it less harsh for people—especially babies—and furry friends. Just toss it in the tub as it fills, leave it in for at least three minutes before bathing, and emerge from the bath with happier, chlorine-free skin and hair. Lasts for about 200 baths, or one year. Made in China.