DuraBlue Sterilization Wrap 40″ x 40″ (101cm x 101cm). All wraps are made with non-woven 100% polypropylene SMS* technology for superior strength and microbial protection. Spunbond/Meltblown/Spunbond (SMS): Consists of meltblown polypropylene between layers of spunbonded polypropylene. It is strong, fluid resistant, breathable and provides durable protection. UOM: 120/CS.