Woot offers Zone Tech Car Back Seat Travel Inflatable Air Mattress Kit w/ 2 Air Pillows for $21.99 + free shipping with Amazon Prime.

Product Description:
The Zone Tech inflatable mattress is made from Premium Quality washable soft PVC flocking material to ensure maximum Strength, Durability and Comfort for long lasting usage.
It is certified environment friendly, and Hygienic. The mattress features Double Valve which makes it Leak proof. This also makes inflating and deflating the pillow quick and easy.
The mattress also comes with 2 pillows to complete the relaxation you need. The Zone Tech inflatable is easy to use and can be set up in minutes.

• Simply blow the mattress with the electric air pump till its inflated to use and deflate it.
• The package comes with a pouch so you can carry and store it easily with you. 
• Keep yourself and your family at Ease and Comfort wherever you go with the Zone Tech Travel Inflatable Mattress.
• Whenever you stop by rest, let this mattress give the relaxation you need to get ready for your journey.
• This also can be a good use for hiking, camping, and any outdoor activities.
• This mattress can be your trusted travel companion, providing everything you need for on-the-go living.