The Dyson Zone headphones have great sound, excellent noise canceling and the addition of a visor that can filter out pollution to help you breathe easy. But at almost $1,000 they’re a tough sell, especially for anyone who doesn’t live or work in a place like a major city, where airborne pollution is an issue. A lot of headphone users simply won’t benefit from the air filtration system at the core of the Zone. 
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