A:AnswerNo, the laptop, 13" or otherwise will have to meet this sleeves other dimensions too, they are:
Height: 14.75 inches X Width: 8.5 inches X Depth: 0.8 inches
A:AnswerThe dimensions of the sleeve are (inches): Height - 14.75" X Width - 8.50" X Depth - 0.80". The Yoga 900 dimensions are Height - 12.76" X Width - 8.86" X Depth - 0.59". Because the Yoga 900 is deeper than the sleeve the laptop will stick out and not fit properly. There are two custom cases for the Yoga 900, you can see them here:
http://shop.lenovo.com/SEUILibrary/controller/e/web/LenovoPortal/en_US/catalog.workflow:keyword-search?category-id=5CBCE727A58F4CFB95697F0B75C83399&keywords=yoga 900