They are in essence an inflatable bag with 2 inlet tubes. So the PVC is obviously quite a heavy duty to be able carrying those. There are 2 pvc tubes at the rear of the unit for inflating and then tying off.they can be adapted for other uses.
eBay
Please note: This product might take a little longer to arrive as it may be shipped from outside the UK. The Coverall Deluxe car boot cover is a great way to keep not only the floor of your car boot clean, but also the sides. The interior of your...
zooplus.co.uk
They are in essence an inflatable bag with 2 inlet tubes.
eBay
Inflatable car mattress Inflatable Car Multifunctional Car inflatable bed car accessories inflatable bed travel goods
Aliexpress UK
WATERPROOF HEAVY UV PVC VINYL COVER MARINE INFLATABLES BOAT CAR COVERS FABRIC.
eBay
5mx2mx2m Foldable Waterproof UV Protection Car Storage Bubble Inflatable hail proof Car Cover Grarage Tent
Aliexpress UK
0.8mm PVC Clear Body Quality Heavy PVC waterproof Top and Base. These are 100% PVC Materials not cheaper Oxford Cloth top and Base. From Motor Bike to Large Van. Inflates in a matter of minutes. Also Solid Units for Out Door and UV Protection.
eBay
Outdoor inflatable garage, sunscreen and dustproof PVC clip mesh tent, foldable mobile inflatable car cover
Aliexpress UK
Sport specific indoor inflatable car cover storage system. Size SPORT (Designed lower to make your car look better) - 4.9 x 2.1 x 1.3.
eBay
Car Inflatable Bed Universal Car Self-propelled Car Air Mattress Auto Rear Seat Foot Gap Cushion Inflatable Pads Car Accessories
Aliexpress UK
Smallindoor inflatable car cover storage system.
eBay
Electric Inflatable Pump Electric Air Cushion Camping Inflatable Pump Portable Car Inflatable Pump Swimming Pool Inflatable Fan
Aliexpress UK
Inflatable SUV Camping Mattress Double (185cm x 140cm) with Pump. Inflatable Mattress Key Features. Our inflatable mattresses are designed to provide you with ultimate comfort when sleeping in the back of your car.
eBay
Car Travel Inflatable Mattress Portable Inflatable Back Seat Gap Mat Car Self-Driving Camping Inflatable Mattress Accessories
Aliexpress UK
【What You Get】This car rear seat SUV set includes 1 inflatable rear seat mattress, 1 inflation pump, 1 air pillow, 1 triple air nozzle, 2 headrests, 1 repair kit with glue, and 1 storage bag.
eBay
4.2/4.8m Car Umbrella Fully-Automatic Awning Tent Auto Smart Insulated Cover Outdoor Waterproof Folded Canopy Cover Sun Shade
Aliexpress UK