Good quality tweed is very resilient to rain and dirt. The wool still retains much of its natural oils and this protects the wool. They aren't 100% waterproof but a bit of rain will not harm them.
Dry cleaning is recommended but it's not the only way to care for your coat.
The best way to care for your coat is to hang it on a hanger (avoid leaving it hung up on a coat hook). However, if your coat does develop a few bump or folds from being stored or hung up it will go back to the right shape just hanging it up for a day or so or give it a press with a medium iron. This will also refreshen it up; as will hanging your coat outside on a dry day.
Try not to stuff the pockets too full as they can mis-shape over time. Empty the pockets when you hang your coat up.
If you get your coat dirty try and spot clean it soon after with a slightly damp cloth, or it's dry try a soft old toothbrush. You'll find it comes out fairly easily without a trip to the dry cleaners.
Dry cleaning is notoriously un-environmentally friendly because of the noxious chemicals. Eloise Grey is actively seeking greener dry cleaning providers so welcomes your experiences. Please contact us with your recommendations or warnings!
Moths are also a risk and wreak havoc and unfortunately wool is vulnerable. Advice is to store it carefully in an airtight environment during the months you don't use your coat and invest in some good moth repellents. Make sure you regularly check your cupboards, carpets and drawers to ensure you haven't been infested. Dry cleaning before storage is recommended.
Be careful about Traditional Moth Balls as they contain toxic chemicals such as Naphthalene or Paradischlorobenzene. They can have toxic effects. They have been withdrawn from the UK but it's a good idea to check for Napthalene, Paradichlorobenzene or Dichlorvos.
Eloise Grey is also interested in your experiences of natural moth repellents so do contact us with your experience.