Real machine mold opening ,it is suitable for Logitech K380 Multi-Device Bluetooth Keyboard ,the size fits well .If you use this cover for the first time ,if it feels a little tight, you can put the keyboard in the bag for a few days, the bag will become a little looser . Made of high quality PU leather material , it is waterproof ,dustproof and scratchproof . The surface is smooth and feels comfortable .The edge sewing thread is neat and dense, not easy to crack . Light weight and portable ,you can hold it in your hand or under your armpit. When you are not using the keyboard, please put the keyboard in the protective case to prevent dust. The gaps in the keyboard are not easy to clean. Multi functional: This bag is ultra-thin design, and the leather material on the surface is smooth and comfortable. After the keyboard is taken out for use, the keyboard bag can be used as a mouse pad. The mouse is smooth and sensitive on the pad.