🚿【Trusted and certified】This bath filter uses the filtration material produced by PA-USA, and the water filter material used by NASA, you can use it trustfully. NSF/ANSI 42 certification-NSF is considered as the strong certification brand worldwide. 🚿【Excellent filtration performance】The filter material can remove hundreds of billions of pollutants per square meter, and the efficiency achieves to 99,9999%! Reduce the probability of skin damage and disease, suitable for people with skin diseases or low immunity, such as ladies, the elderly, infants etc. 🚿【Effective filtration】The thickness of the water filter medium is about 2.2mm, composed of 400 layers of natural fibers, and the micro-porous is about 1.2 microns, so it can remove substances and pollutants with small diameters, such as sub-micron particles in pipe scale, and also effectively remove chlorine,heavy metals and chemicals in order to reduce skin erosion and make your skin healthy. 🚿【Low water pressure and high flux】The high-performance water filter and ultra-low water pressure maintain a large flow of water to improve the rinsing effect and protect your skin, hairn etc. But if you use dirty water, you need to use a larger area filter. According to water quality and frequency of use, the standard filter is recommended to be replaced every 3-6 months. 🚿【Widely compatible and easy to install】It uses a standard 1/2" thread type and is compatible with all shower types, including fixed, rain and handheld showers. No tool required.It only takes a few minutes to install without any tools. Just open the shower filter ,take out the old filter and replace with a new one.