This shower filter features ProMax’s encapsulated multi-stage filter technology. Each stage is comprised of a unique formula of filtration media designed to target a specific group of contaminants. It helps to protect your skin from the unhealthy effects of contaminants that may be in your water. An independent lab test (see at www.propurusa.com) shows the Propur ProMax Shower Filter helps reduce over 200 contaminants, including VOC’s, heavy metals, lead, pesticides, chloramines, chlorine, fluoride, herbicides, pharmaceuticals, and odor. It also helps control scale, algae, and bacteria. And the best part – it’s easy to install!