Why are wool blankets and synthetic fabrics removed from a resident's room when oxygen is in use?

Wool blankets and synthetic fabrics are removed because they can produce static electricity, which may create a spark. Since oxygen supports combustion, a spark near supplemental oxygen could ignite a fire.

In an area where oxygen is in use, the fire risk is increased because oxygen helps things burn. The safety measures listed for oxygen use include removing wool blankets and synthetic fabrics that cause static electricity. Static electricity can produce a spark, and a spark is one of the three things needed for a fire, along with a burnable material and oxygen. Removing these items helps prevent accidental ignition.