The 6D31 Dome is one of the most rare and large sized variants of the Base-X series. It has a multi-use role whether act as a command center, serve as a medical facility, or used as a dining area, but is mainly designed to inter-connect smaller tents to and be used as a central hub. It is large enough to house about a dozen personnel and features 6 doors and 6 windows. A secondary layer of a white interior canvas skin called a liner is optional. Its purpose is to provide additional insulation and includes electrical, an ECU plenum for air distribution, and a soft green floor for weather proofing which comes as one piece and can be installed on the interior of the frame. The frame consists of durable aluminum poles which the exterior canvas skin is connected to, and the system can be setup in a matter of 15 minutes by a trained crew.