Do you know the difference between an ITMG and a TLSA?  If not, read on!

Briefly, the EMU was a multi-part system designed for wear outside the spacecraft in the harsh lunar environment.  It consisted of several sub-assemblies.  First, the IMU or Intravehicular Mobility Unit and the basic EMU were the suits worn inside the spacecraft during launch and critical mission events which had the potential of breaching the hull of the spacecraft.  The IMU/EMU consisted of the Pressure Garment Assembly (PGA) plus the Communications Carrier (Comm Carrier - the "Snoopy Cap"), the Pressure Helmet Assembly (Bubble Helmet) and Pressure Gloves.  The PGA was made up of the Torso-Limb Suit Assembly (TLSA), the Integrated Thermal Micrometeroroid Garment (ITMG), and the PGA Electrical Harness.  While inside the CSM the crew also wore the Constant Wear Garment (CWG), on the moon the CDR & LMP wore the Liquid Cooling Garment (LCG).