Today, I had a go at removing slight puckering/bagginess from the front cloth seats.
(1) Driver's Seat: One seat base bolster along the top ridge was slightly puckered. A damp cloth and a steam iron sorted this.
(2) Passenger Front Seat: One section of the Alcantara on the seat base was a bit baggy. Application of a damp cloth and a bit of steam sorted this.
Now better than when new!