The YOGA 900s is stylish and elegant hybrid Ultrabook. 12.8mm thickness makes it the world's slimmest device in the convertible category. 900s features innovative watch band hinge which can rotate 360 degree and adapt to different scenarios. 10.5-hour long battery life will help your 'always-on' lifestyle. Web-core carbon is embedded in A cover, makes it thin and light but also strong. Leather adds a soft touch on C cover, a comfortable support for holding and typing.