How often should you wash your outdoor clothing?
It all depends on how often you go out, how warm it is and how much direct contact it has with your skin.
Base layers need to be washed more frequently to prevent accumulation of salt and dirt. If your base layer is made of merino wool, you can put off washing it, but it you have a synthetic base layer, we recommend washing it after each climb, especially if you have sweated a lot.
Wash second layers (fleeces, sweatshirts, down jackets) and trousers after several outings or as and when you need to.
Jackets (softshell, waterproof jackets) can be cleaned once or twice a year maximum. Remember that a waterproof jacket should be washed as infrequently as possible.
You can skip the chore of washing and just use stain remover on the dirty areas only.
Tip: if your synthetic clothing has yellow stains on the armpits: these are stains left behind from a chemical reaction between your deodorant and sweat. During the natural sweating process, mineral salts in your sweat come into contact with the aluminium salts present in most deodorants, leaving yellow stains on clothes. To reduce the staining, you can use white vinegar or lemon before washing.