You can air dry the jacket, but a tumble dryer will guarantee best results.
Set your tumble dryer to the lowest heat setting and add your down jacket along with 2 drier balls or clean tennis balls. As the balls bounce around in the drum, they fluff up the feather filling, stopping them from sticking together and losing insulation. It’ll take a couple of hours to completely dry, and it’s recommended to interrupt the cycle every half an hour to shake the jacket out and make sure the feathers aren’t clumping.
You’ll know your jacket is dry inside and out when it feels light and fluffy.
1) If you wear your down jacket weekly, try to wash it at least every other month. For seasonal wearers, twice a year should do the trick
2) Don’t be tempted to let old cleaner remain in the drum. Normal detergents can strip feathers of their natural oils, making them weak and brittle – we want them strong and fluffy to keep you warm! It may also impair the water-repellent shell exterior
3) Don’t ever iron your down jacket – it will melt!
4) Always store your jacket – and anything filled with down for that matter – in a cool dry place, and hang it up rather than scrunching or folding it into a bag
Fear not buying down jackets not knowing how to wash it. Now you can invest!~