Sack-O-Phones are a convenient way to transport multiple headphones and equipment from class to class. The carry bag doubles as a knapsack and holds 5 Primo™ headphones with 3.5 mm TRS plug. Every headphone comes in its own heavy-duty, anti-lice, write-on, moisture-resistant, resealable bag. Noise-reducing ear cups, a 3.5 mm plug, making it a versatile unit to connect to virtually any device. It's exclusive Dura-Cord™ - the kink and chew-resistant cord, is built for everyday use. Includes: 5 Stereo headphones and 1 Sack-O-Phones Carry bag. Available in Blue, Black and Red.