Columbia Circuit Breaker Backpack Daypack LAPTOP STUDENT BAG purple grey Dimensions: 20" x 13" x 8.75" Omni-Shield - Resist Rain and Stains Techlite - Durable, impact absorbing material provides superior comfort and cushioning Backdraft ventilated back panel Externally accessible, bottom-padded tricot-lined laptop sleeve for up to a 17" laptop Dual water-bottle