HS-100 - Headset This state-of-the-art headset includes 2 mouthpiece covers and 12 additional mouthpiece filters. Its unique design allows you to breath the cool, fresh, oxygen enriched air through your nose or mouth. Price: $43.95 Enter the appropriate quantity for this item below, then click the 'Add To Cart' button to add the item to your shopping cart. * - Denotes a required field. Quantity *