Thule Paramount Commuter Backpack, Black, One Size, 18 L

Floating laptop compartment for increased comfort (fits laptops up to 16") Unzip side panels to expand storage capacity up to 50% Roll-top closure and durable, coated materials provide reliable weather protection Access your phone easily from dedicated side pocket while in riding position Reflective accents enhance visibility from all angles Enhanced stability and comfort with expertly designed shoulder strap shape and integrated sternum strap Generous 18L of storage space to carry everything you need for the day Exterior pockets keep bike lock and other essentials in easy reach Attach helmet to outside of bag while off the bike Ventilated back panel and shoulder straps increase airflow