The first time I lifed the back seat bottom, I did find two pieces of
foam rubber cut into 3x3 square tubes under the front edge of the back
seat. And it was clear from their cuts/shape that they had been
amateurly cut.

That's a standard, very effective (and often over-looked) cold-weather air
sealing technique.

When it's below zero, that foam can make all the difference between comfort
and agony, in the back seat.
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"