I am so glad I invested in this bag. The price tag is a little daunting but it is worth every penny. The bag is extremely durable and fits everything I need for my pumping sessions. I use the Spectra S1 pump and I am able to fit it in a side pocket with the tubing still attached. I am also able to fit my cooler and pumparoo bag, and my essentials like a pumping cover, bra and snacks. I highly recommend this bag for any mom who knows she will be pumping a significant amount of time!