Why should you only wear your shoes every other day?
Leather shoes absorb and store moisture. After being worn, they need to rest for a day to release the moisture they have already absorbed. Otherwise, white perspiration stains can form, and damp shoes are also an ideal breeding ground for the fungi and other organisms which cause athlete's foot.
Why do I need shoe trees?
Shoe trees make shoes last longer by smoothing out the creases caused by walking and maintaining the shape of the shoes. Wooden shoe trees are preferable, since wood also absorbs moisture.
How should I store my shoes when I am not wearing them?
If you are not planning on wearing a pair of shoes for a while (for example, winter shoes in the summertime), it is advisable to clean them thoroughly and put shoe trees in them, and then keep them in a dry place. They should be kept in a box or a shoe bag made of material which can breathe (cloth bag) to protect them from dust. Do not use airtight plastic bags, since the shoes could become moldy or mildewed!