Cast Under-Padding, 5" (width) x 11 yards (length). 1 roll per box. NEO Underpad is a hypoallergenic, synthetic cast padding that features Quick-Wick Technology that allows a patient the ability to expose the cast to wet conditions. NEO Under-Pad contains a water repellent, circular-knitted fiber that drains water effortlessly. It also retains less water than traditional padding. The combination of NEO Under-Pad with NEO Casting Tape can provide a patient with unmatched comfort and flexibility.