original mats where a fiber /cloth type mat.
All reproductions are vinyl.
For all 61 to 64 Hardtops, 2drs, 4 doors only 3 mats no mat's on the spare tire shelf .
All convertible's 61 to 64 had 4 mats and a mat under the spare tire on a passenger side shelf by the passenger 1/4 panel
The 4th mat on convertibles was on the shelf under the top rack area.
Bob is right on moisture collecting under the vinyl mats.
Paul