What it is they inhale
What it is that they inhale; model airplane glue, nail polish, nail polish remover, cleaning fluids, hair spray, gasoline, the propellants in aerosol, spray paint, fabric protector, air conditioners fluid "freon", cooking spray, correction fluid, and many more.
What they use to inhale
What they use to inhale things;they sniff, snort, bagged" fumes inhaled from a plastic bag", huffed, soaked rag, sock, rolled toilet paper in the mouth, or sniffed directly from the container.