A software inner bag with the pocket for exclusive use of the expansion and contraction that stores a model in a bag clearly in Microsoft (R) Surface Go 2018, and can receive a mouse and an AC adapter at the same time. The inner bag who protects the apparatus body from a wound and a dirt using the high-quality cloth which is hard to become dirtyUsing the high-quality cloth which is hard to become dirty, it is an inner bag for model for Microsoft®Surface™Go 2,018 years to protect the apparatus body from a wound and a dirt.TB-MSG18NPPBKTB-MSG18NPPRD Pocket of the stretch materialThere is the extension pocket which can be equivalent to the thick things such as a mouse or the AC adapter in the front. Double fastener adoptionI adopt the fully open-type double fastener which it is easy to put in and out. I store the Surface penThere is the pen holder that I can store genuine Surface™ pen in the front pocket inside.