This is the replacement Sleep8 sanitizing bag with a built-in charcoal filter and air release valve.

CLEANING & CARE: The Sleep8 Sanitizing Bag contains a special filter that should be kept dry. If the bag becomes soiled, wipe it clean with a dry cloth. The Sleep8’s activated oxygen system fully sanitizes whatever is in the bag, as well as the interior of the bag itself. For optimal performance, the bag should be replaced after approximately 3 months of use. For complete instructions review the documentation that came with your equipment.