The BowTie™ Biohazard Bags exclusive drawstring loops provide an instant cinch closure and easy removal from bag stands. These drawstring loops allow for venting during sterilization and offer an easy and safe way to remove bags from a hot autoclave. Bags are clearly marked with a biohazard symbol. The BowTie Biohazard Bag is made of 2.25 mil HDPE and is suitable for autoclaving in 121°C cycles.