See what Mooselabs has to say about their MoithPeaces:
"Did you know hemp smoke can deposit tar deeper into the lungs than cigarettes because of how it’s inhaled?
After 16 months of R&D, we created the MouthPeace and MouthPeace Filters. Made from biodegradable and recycled materials, the triple-layer activated carbon filters sanitize smoke/vapor and enhance flavors by removing resins, contaminants, and tar; all without blocking your intake or reducing airflow.
Replace Filter as needed for optimal performance. See and feel the difference.
Kit includes MouthPeace & 3 Filters." - mooselabs.com