The rear of the Leslie "Total Environment" racing seat has their manufacturer's label attached:
The seat back is smooth with a nice finished feel to it. The back itself is reinforced and anchored to the roll cage.
The base of the seat is molded to fit snugly around and bolted to round tubing, or in this case solid round stock.
The steel base frame bolts to the original factory seat attachment points. The frame has two adjustment positions. The back support also has two corresponding positions.
When assembled, the seat is sandwiched between the solid round bar of the base frame and metal reinforcements. The quilted Naugahyde covers and cushions all of the hardware.