The second case is WaterField's new version of the SleeveCase, a more general design usually meant for many different notebooks. The case is made of a nylon exterior and a neoprene interior, and can be customized with a vertical or horizontal orientation, a strap, a front flap, and/or a detachable accessory holder. The new MacBook Air size (13-2) can be pre-ordered for prices starting at $40, but will only ship sometime before January 25th.