Flexible, Soft, Foldable, Roll-up, Silent, Waterproof, Dustproof, Lightweight, Portable and easy to store. Multiple function make it an extraordinary computer keyboard! Soft silicone material: Made of high intensity and high elasticity silicone gel, non-toxic and odorless. Flexible material allow you to fold it or roll up freely, very handy and convenient to take with notebook, laptop and mac.