Dynarex Sterilization Pouches, Various OptionsDynarex Sterilization Pouches Sterilization pouches are easy to read, a strong material, and pre folded for correct closure. The Dynarex Sterilization Pouches have a blue tinted cover making it easy to detect contamination. The sterilization pouches are self sealing and have color changing indicators to assure proper sterilization. Self sealing Blue tinted transparent cover makes it easy to detect contamination Internal and external color changing