You won't need wax or other popular products to protect your shoes from moisture.
In summer, there is no need to remove salt stains from shoes, but other problems arise.
For example, in the summer, leather shoes often get wet. It will rain, and the pair will have to stand for several days to dry.
You can use a special impregnation that repels moisture. But you can get by with a cheaper product that can be found in the first aid kit.
Vaseline has the same properties as wax and other similar products. It provides the leather with long-term protection from moisture. If it is raining outside, you can lubricate the pair with this product before going out, so that the shoes dry faster later.
Another option is a mixture of alcohol and glycerin. The products should be mixed in equal proportions, and then carefully distribute the liquid with a soft cloth. A protective layer will form that will protect the shoes from water.