[Official Japanese Product] KOSS Open-Back Headphones, Over-the-Head/Neckband Compatible, SPORTA PRO

From Amazon

These headphones combine superior sound quality and performance with a fashionable design and a convenient, portable form factor. A new concept allows them to be worn as both a neckband and a headband, resulting in a natural fit. The lightweight unit makes them ideal for outdoor use. They deliver clear sound quality and a soft feel.

Product Description

Dynamic open-air headphones Noise canceling: Not supported Surround sound: Not supported Weight: 62 g