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Aseptic barriers are employed in the form of surgical gowns, drapes, and wrappers for sterile goods. They possess many of the attributes of textiles, but must also protect sterile zones from microbial invasion. Surgeons rely on them to resist penetration by liquids and other bacterial vehicles. A large variety of both woven and nonwoven materials are being produced for this purpose. The user is faced with difficult choices. The provider of the barrier materials must assure the surgeon of their barrier quality under the usual conditions of their use in operating rooms. Identical standards of quality can be and should be applicable whether these materials are created to be used once and discarded or are reusable.