... coated on clavier surface, do not affect any keyboard, 8, waterproof, dustproof, never worry for water, coke, coffee, dust and ash, ... 10, receive convenient, can free tortuous without deformation. 11, silicone material, soft touch, the surface has non-slip function, let ... affect clavier operations.If you are interesting , pls attached me. dustproof waterproof silicone keyboard cover for HP series