SH350 Over the Head Binaural Headset w/ Large Earcaps, Noise Cancelling Mic. Special acoustic foam ear pads optimize sound penetration around the center of the cushion and into the ear canal while minimizing leakage. The sound remains superb whether using leatherette or foam ear pads. Noise Canceling blocks out a great amount of ambient noise, making your voice easier to understand. Comfortable large ear caps shut out ambient noise allowing better concentration.