Jansport Superbreak Backpack - Mammoth Blue Preston Plaid This is Jansports number 1 best seller! Long-lasting, durable 600 Denier Polyester, Lightweight, weighs approximately 12 ounces light Large, roomy main compartment keeps essentials handy and secured The medium size front pocket has a built in organizer for smaller stuff and can easily hold pencils, pens, calculators and other items Straight-cut, adjustable padded shoulder straps makes carrying easy, 2/3-padded back panel, Loop locker handle