BSN Medical Delta-Rol® Synthetic Undercast Padding retains a comfortable bulk and cushioning, even when wet. Delta-Rol® Synthetic Cast Padding is made of 100% acrylic fibers. The synthetic fibers are non-absorbent and allow moisture to leave, reducing the risk of maceration or unscheduled cast changes. BSN Cast Padding has a comfortable stretch, easily conforming around digits or body contours. Delta-Rol® Acrylic Casting Padding is easily torn without the need for scissors, and is easy to roll and apply. Delta-RolÂ® Cast Padding is ideal when lasting bulk and cushioning are desired.