LUXA2 K2 Keyboard Protector is made of durable, non-toxic engineering-grade thermoplastic urethane (TPU) that tailor-made for the MacBook Air 11”. As delicate as the MBA, the LUXA2 K2 Keyboard Protector allows the most comfortable typing experience while providing maximum protection as well. The thickness of K2 is only 1/5 of other silicone protectors, promising an unparalleled key sensitivity and response.