If you like your music to follow you around then the Nixon Trooper Headphones are your bag. The custom folding hinge makes them easy to store in a pack. Or if thatAAAs too risky for your primo headphones you can put them in the custom molded carrying case. 40mm drivers power these bad boys, so donAAAt worry about your music sounding weak. And for comforts sake Nixon made the ear cushions out of custom molded silicone and padded the headband. Product FeaturesMaterial: plasticDriver: 40 mmFrequency Response: Input Connection: plug 3.5 mmCord Length: 150 cmWeight: 170 gRecommended Use: jammin" tunesManufacturer Warranty: 2 years