Recent tests prove that this simple, effective and economical immobilization solution provides the lowest deflection in the 400 to 500 lb weight class! Iron Duck’s tough, durable, completely impervious, HDPE shell over polyurethane foam fill provides rigidity, 100% X-Ray translucency, high bouyancy for water rescue, ease of maintenance and storage…in a lightweight backboard. 5-year warranty. Available in red, yellow, orange, blue or lime. Measures 72? x 16? x 1 3/4?. Weighs 15 lbs.