The flatness of the soft lining greatly protects the machine. Ultrasonic technology solidly bonds the leather to the rear cover, offering comprehensive protection. High-quality anti-scratch protective film protects the screen forever. To ensure the best all around protection the case is made from soft inner lining as well as the tough exterior fabric. The sleeve provides safety and reliability to ensure a long life span for your tablet device. Sleeve. Polyurethane. (not included).