Staples offers the Audio-Technica QuietPoint Active Noise-Cancelling Headphones, model no. ATH-ANC29, for $45. Plus, Staples Rewards members bag free shipping. (Not a member? It's free to join.) That's the lowest total price we could find by $5. Features include a frequency response of 20Hz to 20kHz, ambient noise reduction of up to 87%, 40mm drivers, 3.5mm detachable plug, zippered carry pouch, and airline adapter. They require one AAA battery (included).