Durable, safe, innovative design. Used for Steam and Ethylene Oxide Sterilization. Wide triple sealed seams for additional strength. External and internal Steam and Ethylene Oxide indicators for additional verification. Sterilization changes Steam indicators from blue to black and Ethylene Oxide indicators from pink to yellow. Wide chevron seal protects against instrument breaches. Ease of access thumb notch. Large tack seals prevent curling of corners and protect from contaminant exposure. Strong self sealing adhesive band provides tight seal.