Sennheiser PX 100 (Black) Folding stereo headphones at Crutchfield
Sennheiser PXC 550 II Wireless Noise Cancelling Headphones
Amazon.com: Sennheiser PXC 550 Wireless – NoiseGard Adaptive Noise Cancelling, Bluetooth Headphone with Touch Sensitive Control and 30-Hour Battery Life : Electronics