Philips HN 110 Folding Noise-Canceling Headphones, Noise canceling feature reduces background nose in any environment; ideal for airplane, train and bus use. Closed-style, dynamic headphone with 40mm driver, neodymium magnet, and CCAW voice coils. Foldable headband allows phones to fold down to a small size for convenient storage when not in use. Includes travel pouch.