There is a permanent bunk behind the cockpit which is a double bunk. Cockpit crew use this one as in our case.
There is also a LDMCR Lower Deck Multi Crew Rest which is just behind the wingbox in the aft cargo hold which is inserted on longhaul. It basically a specially made Cargo container ( in basic terms, but very smart and modern) joined into a double unit and inserted first, into the cargo hold. It has I think space for 7 crew resting ( possibly 6, not able to count at that time of the night), very smart and a better place to fall a sleep.