From the name itself, you would guess that this is an icon pack which will change all the icons of your windows 10 into ones related to Christmas.
This theme not only changes your icons but also the user interface. Things like the start menu, taskbar, dialog box and much more.
It also changes your current wallpaper into Christmas themed wallpaper. This theme is not only compatible with windows 10 but also with the other versions of windows.
You could appreciate this theme by installing it on your computer.
Download this theme from here.