Before washing your ski jacket, stop and ask yourself: is this really necessary? Generally speaking, functional clothing should be put into the washing machine as little as possible, so that the sensitive materials are not damaged. However, if you feel that your ski jacket is in need of a good wash, first of all carefully read the instructions on the care label.
It is generally best not to put items like a ski jacket into the washing machine together with other laundry. The zip on your ski jacket could, for one thing, damage your favourite blouse. Moreover, you would be wise to choose a special detergent for waterproof functional items, so that your ski jacket is washed properly. This will ensure that your ski jacket remains breathable and water-repellent but it is not the detergent you would otherwise choose for everyday washing. If you have a down jacket, then choose a detergent that is specifically geared towards down. It preserves the natural loft of down.
Furthermore, irrespective of whether you intend to wash a new ski jacket or one that has already been worn, avoid, whatever you do, the use of either a fabric softener or bleach, as these will clog the pores in the membrane. Moreover, select a programme for delicates and a slow spin when washing your ski jacket.