Intex Twin Size Air Mattress, 18In Height, Built-In Pump, Dura-Beam, Guests COMFORT ? With a bed height of 18" this luxurious and unique dual-layer air pocket system contours to your body for supreme comfort; with a velvety top and sides that are soft to the touch, and resist punctures and abrasions; on-the-go carry bag included UNIQUE EDGE CONSTRUCTION ? Dura-Beam Air Mattresses are designed with a unique edge construction to withstand the weight of the sleeper without sagging and is 100% more durable, 35% more supportive and 15% lighter than a traditional airbed LUMBAR SUPPORT ? Horizontally positioned Dura-Beams provides 50% greater individual strand count for an improved full body support; Fiber-Tech Construction is comprised of thousands of high-strength polyester fibers for amazing durability and strength BUILT-IN AC ELECTRIC PUMP ? High-Powered built-in electric pump (110-120V) for hassle-free inflation and deflation; users can easily and quickly set up the air mattress when they need it and then deflate it (Approximate inflation time 2.25 minutes) STRETCH ? At first inflation the material will STRETCH, which is sometimes misinterpreted as leaking; You will sense a loss of pressure, that's just the bed stretching, simply re-inflate the bed again; the bed will fully settle within 2-3 nights