Nintendo Switch Joy-Con includes a glossy part and matte part. If you want to make the glossy part matte, here is how: First you need to remove the back cover of the joy con by pulling it up. Then you need to remove the cover of the buttons and slide the cover of the joy con up. This is what it looks like after you remove the cover. Now you need to gently slide the cover off. It gets stuck on the board a little bit but can be easily slid out. Now you need to get a hair dryer and put it on high. Then you need to hold the hair dryer on the glossy part for about 5 seconds and then you will start to see the difference. After about 10 seconds the color of the glossy part will change. You can always put the back cover back if you don’t like it.