Our opinion:-

Optional Awning/Tent Carpet. Provides a warm soft feel layer to your awning or Tents sewn in groundsheet. Easy to clean, with a waterproof backing, can also be used as a picnic rug

 A bit of added luxury for your awning or tent

What the manufacturer says:-

Outwell tent carpets in a soft yet durable lylex fabric are custom-made to fit each tent’s living area and are available as an optional extra ensuring the home-from-home feeling under foot.

• Wall-to-wall carpet
• Small pack size
• PVC protective backing
• Integral packing sleeve