Instead of banging cushions together outside, just toss in dryer one at a time on low setting for about 5 minutes. All the dust from cushions and pillows will go into the lint filter and will save your arms from doing all that work. I also do this to stuffed animals, just be sure it is on air fluff and not long, otherwise some fur on stuffed animals will singe.
This is a page about removing odors from couch cushions. Couch cushions can pick up all kinds of odors from daily use.
The cushions for your outdoor furniture can become mold stained, stained by the weather, or just soiled from routine use. Cleaning them is a must. Try some of the tips found below.