Safe Room is a Location in The Division.
Safe Rooms Outside Dark Zones
Outside of Dark Zones, Safe Rooms provide players with access to their stash, Vendors, and Notice Board and with Online matchmaking. From inside a Safe Room you will be able inspect other random players and invite them for co-op play and vice versa. They do not provide access to your Security, Medical and Tech Wings so you cannot perform upgrades associated with these elements in Safe Rooms.
Safe Rooms Inside Dark Zones
Inside Dark Zones, a Safe Room is specifically for the player and their team. Upon entering a Dark Zone Safe Room, players will only be able to see members of their own teams. Functionally these Safe Rooms are less featured than ones outside of Dark Zones. They provide a restock for Ammo and Consumables and feature a special Vendor that sells High End Weapons and High End Gear. Items purchased from a Dark Zone Vendor require Dark Zone currency and minimum Dark Zone Rank in addition to a minimum player level.