Comply A-100 Foam Situational Aware Tips for Radio Communication (Black, Medium, 6-tip Pack) 360 Aware: Comply Foam Tips A-100 allow ambient sounds to pass through for added safety and are perfect for in-ear two-way and listen-only devices. Soft Comfort: Fast-recovery Comply foam provides a secure fit that remains comfortable during extended use, reducing irritation and ear fatigue. Stay-In-Ear Fit: Patented "Dual Layer" technology dramatically increases retention during physical activities and provides a secure in-ear fit for today's most challenging law enforcement assignments Universal Fit: Comply Foam Tips A-100 feature a universal fit for any acoustic tube barbed adapter.