Sennheiser HD 280 PRO Over Ear HeadphonesThe HD 280 Pro is Sennheiser's most significant closed, around-the-ear headphones 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 necessary in the field. The unique collapsible design, combined with swiveling ear cups, offers maximum flexibility in any application.