With the use of our Air Bed Components, our exclusive, 1.8 lb. Density, CertiPUR-US® approved foam, rail design, prevents the bed from bowing out on the sides. CertiPUR-US® certified foam products are "simply better for you and better for the environment". Some other manufacturers' rails use nothing or Velcro at the corners or with Sleep Number®, only lock in the corner (think "Lincoln Logs")or sat in plastic elbows. Both our head and foot rails are connected with a very thin, non stretchable cloth as are our 2 side rails connected, with the same thin layer of, non stretchable, nylon cloth, forming a non rigid box, inside of our air beds. Our "Perimeter Support, Sling Rail Design" will not allow the air chambers to bulge out (no bowing) and keeps the air chambers tight, so there is no "Gap" or "Hole" down the middle of our Air Beds. There is NO NEED FOR A CENTER FOAM "WALL" INSERT. Our "Perimeter Support, Sling Rail" System also helps gives our customers a much better edge to sit on, that does not sag/bow out and break down, when sat on, year after year. They also make assembly much easier! Again, this "Perimeter Support" rail system is designed for the specialized components offered in all of our Air Beds and may not supply the above, described results, with other Air Bed Components. The Rail Systems are considered "Special Orders" and may take longer for delivery, than our normal parts delivery.
If you have questions, please give us a call!