Okay, it sounds odd, but these are secondary raised little mats that sit on top of the rear mats to raise the front of your foot up.
Because the legroom is so large, you are likely to sit with your legs stretched out but your feet will still want to sit flat on the floor. These mats raise the front of your foot an inch, taking some pressure off your leg muscles and ankles.
A guy is selling them for £68.81 EACH on eBay in the U.K. or £95 on eBay from Germany. I got these for the postage cost of £4 from a Skoda forum member who had a spare set with his second Laurent & Klement Superb.
Vacuumed and shampoo’d rear mats (not bad for two years old).
Lounge mats tried out for looks.
and in situ.
One more thing in common with a Rolls Royce after the umbrellas. Lol.