Tucano Microfiber Sleeve 13.3" MacBook & Aluminum Grey BFUS-MB13-GV The Outside is Microfiber and The inside is 3m Soft Neoprene Microfiber folder & soft protection blanket for screen and keypad. Furnished with Anti-Slip System elastic cover positioned under the zipper to protect your equipment from scratches and prevent slippage. Carry on its own or as a complete protection inside another computer bag.