Steri-Drape™ Under Buttocks Drape with Fluid Collection Pouch. The under buttocks part is made of an absorbent resistant to fluid strike through fabric, fabric, with a cuff to protect sterile gloves from contamination during application. The under buttocks part is attached to a big (heavy duty) triangular shape polyethylene pouch with malleable wire strip to keep it open. Overall: 86cm x 108cm. cuff, 86cm x 108cm