It is essential to store your pack n play well when not in use or while travelling. Since the size is slightly different than regular mattresses or baby toys, good pack n play bags are something that you should invest in for safekeeping. The bag should be able to take the weight of the pack n play effectively. The pack n play should be lightweight and compact for travelling and fit in your car. It should be easy to use, and the small pack n play should be compact. Make sure it is durable, and a portable pack n play should allow ease of carrying.