Add all day comfort with a pair of silicone gel ear seals. Other gel seals tend to squash out over time. Rugged gel ear seals conform better and block out noise for increased Noise Reduction. Polyurethane construction resists cuts and abrasions. Fits all Rugged, DRE, Avcomm, David Clark style aviation, racing and safety headsets. Sold as a pair. Note: Not compatible with H28 Alpha Bass Headsets.