Arthroscopic knee drape delivers optimal protection and performance in creating and maintaining a sterile field during surgery.. Circular, 2.5-inch conformable fenestration. Made of 100% polypropylene, state-of-the-art SMS nonwoven fabric is soft, drapable, and fluid-resistant.. SMS fabric constructed of three layers of material: spunbond, meltblown, spunbond.. Inner meltblown layer provides superior filtering, barrier and strength properties.. Spunbond outer layers provide excellent resistance to strike-through, tears, punctures and abrasion.. 90 inches wide x 124 inches long.