NO FILTERS WITH THIS. Fitted then put in emergency bugout bags but never deployed. Lenses are in excellent condition, only the lightest wear if any from being packed away shuffling around a little. This is the SF10 which is a version of the S10. SF10 has two filter capacity with a plug for side not used. There is no drinking tube. Also has larger stronger polycarbonate flat lenses. It is not intended for use as safety equipment, personal protective equipment (PPE), or for any type of breathing protection. Vintage or surplus filters may contain hazardous materials (such as asbestos or chromium).