Incase's Neoprene Sleeve ($30) has been made available for other tablets and computers before; now, it comes to the iPad mini. The sleeve is about as basic as they come, with two pieces of neoprene held together with piping around most of the holder and a zipper at the top. Inside, it's lined with soft white faux fur. Coming only in black, Neoprene Sleeve is probably best carried in a larger bag.
