Description of Timbuk2 Outtawhack Day Pack All good things come in threes: The Outtawhack looks like a messenger bag, carries like a briefcase, and wears like a pack. The updated model has more capacity and better organization. Features: Unique 3 panel design and rugged ballistic nylon exterior Main zip compartment with ample room for papers and files Second zip compartment with 360-degree padded laptop protection and corduroy liner Headphone port Under-flap organizer for quick access; MP3 and cell phone pockets; key ring tether Zip change pocket Padded back panel and airflow channel provide comfort and breathability Safety flasher attachment loop Timbuk2 Quality Guarantee 18"W x 11.5"H x 5.5"D (45.72cm x 29.21cm x 13.97) 3.2lbs (1.45kg)