Some people need a pulse flow portable oxygen concentrator, meaning your oxygen device detects when you are taking a breath-in, and the machine releases the correct dose of medical-grade purified oxygen.
While oxygen tanks do offer pulse flow settings, you would have to sacrifice your personal freedom to travel or be active due to the restrictive nature of a medical oxygen tank.
Instead you have the option to maintain independence and personal freedom by using the Inogen One G5 portable oxygen concentrator. This device only weighs 4.7 pounds, and is the size of a regular handbag. It even comes with a carrying case, like an over-the-shoulder bag that is sleek and stylish.