Manufactured with DuPont's Tyvek spundbonded olefin and Mylar, each SPS pouch offers a combination of physical characteristics for superior sterile packaging protection. Up to eight times stronger than paper of equal or greater weight. In addition, Tyvek generates virtually no airborne particulates upon package opening and is highly resistant to penetration by most liquids. White medical grade Tyvek with see-through heat resistant clear Mylar and a self-sealing adhesive strip. For use in low temperature sterilization processes.