If you use an ORTLIEB Back-Roller, Bike-Packer or Velo-Shopper for your ride to work, you may want to consider the advantages of the Commuter Insert. You pack the Commuter Insert at home – with your laptop, lunchbox, documents, water bottle, pens, smartphone, change of shoes, etc. – and then simply insert it into your pannier. The advantage is that everything stays well-organized, nothing goes mysteriously missing and nothing hides in the depths of your bag. And so you save time and avoid those nervous moments of uncertainty. While the Commuter Insert is ideal for commuters, it can also be a faithful companion to anyone who transports gear from any point A to any point B.
The Commuter Insert is made of lightweight, durable nylon fabric. A padded compartment for your laptop or tablet is located directly under the handle. There is a separate pen compartment and two compartments for your smartphone and money, including an integrated key chain. The large inside compartment offers plenty of space for provisions and a change of clothes.

Further features:

Stable and tip resistant even when empty
two side mounts for water bottles, etc.
flat mesh pocket (ideal for a bike lock)
foam padding on the sides and bottom
ideal for use with all ORTLIEB Back-Rollers, Bike-Packers and Velo-Shoppers
permits access to the inside pocket of your bike pannier