Sack-O-Phones is a convenient way to transport multiple headphones and equipment from class to class. The carry bag doubles as a knapsack and holds 8 Blue Primo™ headphones with 3.5mm TRS plug and one (1) jackbox. Every headphone in SOP-PRM100LC comes in its own heavy-duty, anti-lice, write-on, moisture-resistant, resealable bag.