PSM hope you and yours are well! I remember that, 1,750,000 of us invaded Wyoming................and all of us drove separate cars
I can assure you that liner has held up better than the vehicle
To answer, the 4oz Primaloft Gold is about 4 times thicker than the polyester insulation inside the issued liner. Gold aka Fusion was codeveloped with the military, It wicks more efficiently than the insulation inside the issued liner as the development concept was that it be as light as down but mitigate moisture issues... it comes close in the weight and far exceeds its ability to insulate when wet...as many here know.
I fondly remember the issue system and recently packed a stash BOB (Alice) with all the original kit I had been issued... even a uniform from basic/AIT circa Late 80s
.... but there was still room for our liner and Shell.
Stay cool down there!