Portable oxygen concentrators (POCs) can improve the quality of life for many Chronic Obstructive Pulmonary Disease (COPD) sufferers. Instead of dragging heavy oxygen tanks around, POCs are much smaller and lighter. Some are small enough to carry in a shoulder bag. People who have POCs are able to remain active in spite of the difficulties of COPD. But because oxygen tanks are the standard of care, POCs are considered luxury items,and medical insurance may not cover one. Before resigning yourself to clumsy oxygen tanks, however, you should first attempt to receive coverage for you portable oxygen concentrator, and if no coverage is possible, there are other alternatives.