Unclutter hides your X mouse cursor when you don't need it, to prevent it from getting in the way. You have only to move the mouse to restore the mouse cursor. Unclutter is very usefull in tiling wm's where you don't need the mouse often.
Unclutter is in community:
pacman -S unclutter
Use your .xinitrc file or WM/DE to start unclutter, for .xinitrc add: