Abstract: As an accessory to cannabis and other smokers, an increased capacity, environmental and ecological friendly, sustainable solution personal air filter is disclosed. The solution effectively and efficiently combines passive filter medium and properties of fluid mechanics to achieve the increased capacity. Additionally, a specific order of passive filter elements is provided to increase filtering efficiency. Wherever possible, biodegradable materials are employed such a biodegradable PLA polymers.

Abstract: As an accessory and in combination to a smoking instrument such as a traditional cigarette, a personal air filter filtering exhale and intermittent smoke emissions, is disclosed. The device is broadly a housing providing a semi-enclosure having a mouthpiece coupled thereto, the mouthpiece including dual check valve technology for an inhale and a reverse exhale function. Separate or multi-directional filters are provided for the exhale function, and also for filtering intermittent emissions occurring between user intakes. The configuration and filter technology herein, seeks to improve air quality in enclosed spaces, additionally further by minimizing or eliminating second hand smoke.