It means you get involved. Technically, our local forms of government are not participatory democracies. Officially, participatory democracy is direct democracy, in the sense that all citizens are actively involved in all important decisions.
It shouldn't if washed with gentle care. Rayon is a cellulose fabric and like most cellulose fabrics, it may shrink when washed. If the manufacturer has indicated the garment should be dry cleaned only, do not push your luck. If it is hand-washable though, you can use the gentle cycle on your washing machine and Woolite to get the job done.
Rayon fabric is basically that synthetic textile fiber which is obtained by forcing a cellulose solution through fine spinnerets. In other words, rayon fabric is a final result of solidifying filaments. Rayon is a unique type of fabric that cannot be termed either a synthetic fabric or natural one.