General Information:-Material: 100% High Grade Silicone.-Thickness: 0.3-0.5mm.-Dimension: Subject to your Laptop model.-Colors Available: Transparent. Special Features:1)        Easy for extension but will not transform.2)        100°C water could be used for disinfection.3)        Environment-friendly product, non-toxic. General Features:1)  Mute-Typing. (Muffle typing noise when you stay in libraries and conference room etc.)2)  Durable for millions of typing and protect your keyboard.3)  Transparent. (very easy to see the characters on the key)4)  Elastic and comfortable for typing.5)  Waterproof. (Prevent water, coke, fruit, juice, coffee, etc. away from your laptop)6)  Dustproof. (Prevent dust, cigarette ash, biscuit bits from away from the keyboard)7)  Washable and reusable.