From Sennheiser website:

"The HD 280 Pro is Sennheiser's most significant closed, around-the-ear headphone to be introduced in years. Designed to exceed the demands of the professional environment, the HD 280 Pro boasts extremely robust construction combined with the sound quality, modular design and aggressive noise isolation the necessary in the field. The unique collapsible design, combined with swiveling ear cups, offers maximum flexibility in any application.

Key Features

• High ambient noise attenuation
• Accurate, linear sound reproduction
• Soft earpads for a comfortable fit
• Folding and rotating earcups for space-saving transport
• Tough, single-sided cable"

https://en-us.sennheiser.com/hd-280-pro

I'm moving, reducing what I own, and have been using a different pair of headphones. These are gently used, come with the original box, function really well, and are in great condition.

New they sell for $99.95
I'm selling for $55 obo