Our hydro shower head filters include double layer PP cotton fibers,anionic mineral stone (white),tourmaline (gray) and medical stone (red),which can effectively remove 99.9999per cent of harmful substances (pollutants,rust,heavy metals and organic chemicals,etc.). Ensures the safest shower water for use in hard water environments. Purifying shower water for skin:Mineral turbo shower head filter is different from other vortex shower head PP cotton filter cartridge,our 5 stage filtration will provide you with better shower ideal water for softer and cleaner skin and hair. Upgraded 5 stage filtration:Our hydro shower head filter includes double layer PP cotton fibers,anionic mineral stone (white),tourmaline (grey),and medical stone (red),which effectively removes 99.9999per cent of hazardous substances (pollutants,rust,heavy metals,organic chemicals,etc.). Ensures the safest shower water for use in hard water environments. Easy to install and available in 3 sizes:Replace your shower head filter in just one second without a plumber or tools. Our 5 stage removable shower head filters fit common hydro showerheads,vortex showerheads,propeller showerheads and turbo fan showerheads on the market. Warm tip: Please measure your shower filter to order the correct size. The smaller the aperture:As we all know,the smaller the pore size,the higher the filtration precision,0.2 micron high density double layer PP cotton,which can filter 99.9999per cent of the tiny substances,and perfectly combined with 3 kinds of mineral stones,which can remove excess chlorine,fluorine and sulfur,nourish the skin,minimize skin dryness,maintain the body natural PH value,and protect the health and safety of the skin. Suitable for both hot and cold water. Replacement frequency:We recommend replacing your shower head filter monthly,but the replacement time depends on the water quality and the frequency of use,when you see the turbo turbine shower head filter turning yellow,you need to replace it with a new one. The worse the water quality problem is,the more you need a filter,and we hope everyone can enjoy clean water without worry..