9H nano Glass Fiber. Thinnest material in India. Easy to attach and de-attach in second. Excellent anti-shock/ anti-shattering for ultimately safety. Bubble free, Air free. No adhesive material. Great resistance for the screen against scratches, drops and impacts. Protect the mobile screen being smashed. Life of screen guard up to 1 year. More durable than tempered glass. Flexible and unbreakable.