KB Covers Keyboard Cover for MacBook Pro/Air, Large Type (LT-M-CB) The KB Covers Large Type Keyboard Cover has been designed for individuals who suffer from macular degeneration, visual impairments, or just have a hard time reading the existing commands on their keyboards and low light conditions. KB Covers has designed the worlds finest silicone keyboard covers to protect and enhance Apple MacBook laptop computers. The durable, ultra-thin silicone we use results in a soft tactile feel that does not restrict typing.