Upgrade to New Comply™Foam Tips 
A100 Situational Awareness and N-100 Total Isolation  allow the ear to breathe, eliminating discomfort and ear fatigue, while providing unmatched noise isolation.  Patented “Dual Layer” technology dramatically increases retention, providing a secure in-ear fit for active users.  Utilizing high-tech viscoelastic memory foam, the Comply™Foam Tips are activated by body heat, becoming ultra-soft and remaining comfortable during extended use.  Compatible with ALL barbed acoustic tube communication earpieces.