Comprised of thousands of high-strength polyester fibers that provide enhanced comfort, stability and support; Fiber-Tech Beam Construction can withstand more weight and pressure without losing its comfortThe Dura-Beam Standard Downy Air Mattress is a comfortable and durable air mattress designed to provide a restful sleep experience. The mattress is constructed using Fiber-Tech technology, which incorporates thousands of high-strength polyester fibers that provide advanced support and stability. The mattress's plush top has been quality tested to ensure maximum comfort, while the vinyl sides and bottom offer durability and longevity. I or stability