Adjusts to fit multiple sizes and shapes of water bottles up to 1L. Padded shoulder strap has multiple attach points to allow for wearing over the shoulder or in sling mode. Mesh pocket fits a mobile phone for easy access during activity. Zipped pocket secures cards or money, along with a fob for keys. Mesh bottom allows for airflow. Constructed with bluesign® approved 400D nylon with YKK zippers & reflective details on the front of the bag and shoulder straps.