There are already a lot of different types of cases for this smartphones and the selection is growing everyday. If you are looking for the best cases for this smartphone you first have to ask yourself what exactly are your needs because eventually you need to find the best cases for you and your own style and needs.
If you like wallet cases like I do, the new Sony Xperia Z5 has a wonderful selection of wallet cases to choose from. I always get me a wallet case as one of the cases for my current smartphone. I use it on many occasions when I go out and I don't want or do not need to take a wallet with me.