Cabin Max Arena Lightweight Multi-Function Backpack for Travel, Gym, Hiking and Everyday Use Durable 210d Ripstop Material with padded back, adjustable shoulder straps and waist strap, for comfort and weight distribution Two main zip compartments and two outer mesh bottle holders on either side Internal padded pocket with headphone port for easy access to MP3 players and Phone External elasticated bands and straps to hold sleeping mat or coat Designed to fit airline restrictions, this bag measures 20x14x8"