The Purekeys hygienic mice have a silicone cover that makes them easy to clean. Because of the closed top surface and the lack and seams the mouse is easy to clean with disinfectant solutions. The high quality silicone cover protects the mouse against fluids and dust while the user can click and scroll like they would on a regular mouse. Purekeys medical mice are resistant to most medical grade cleaning solutions like alcohol, peroxides and chlorine. Purekeys medical mice have a touch scroll sensor which give the user the ability to scroll with high precision and maximum comfort.