Personal-sized, on-ear design. Lightweight, yet ruggedly constructed to withstand riggors of everyday use in a school environment. Features the exclusive Dura-Cord - the chew, kink and knot-resistant, PVC-jacketed, braided nilon cord. The 3.5mm, 120° thin barrel jack is designed to be used with device in a protective case. Replaceable, foam ear cushions.