The IPX7 Waterproof rating is a standard measurement of how well a device or bag can withstand water exposure. It means that the device or bag can be fully submerged in water up to 1 meter deep for up to 30 minutes without any damage to its contents. In the case of the GoDark Faraday Dry Bag, the additional clear plastic water skirt added to the top of the bag ensures a waterproof rating of IPX7, providing maximum protection to your devices in the event they become fully submerged.