1680-denier polyester and 210-denier lining with PVC coating and reflective trim. Padded vertical computer sleeve fits up to 15" laptop. MP3 zip pocket with audio port. Zip front organizer pocket with multiple internal pockets and key holder, zip front pocket with carabiner and web loops and side mesh pockets. Plastic zipper pulls. Adjustable side straps, rubber grab handle and padded, adjustable shoulder straps. Ventilated, air-comfort, padded back.