This Intex Twin Classic Downy Airbed Mattress drops from $15.97 to a price low of $7.97 at Walmart.com. Shipping adds $4.97 for orders less than $50, or you can take advantage of free store pickup. This mattress features plush flocking to keep sheets in place and wave beam construction for a uniform sleeping surface. It has a 4.3 out of 5 star customer rating with more than 570 reviews. Sales tax is charged in most states.