You can easily extend the life of a good pair of leather shoes by not wearing them every day. Instead give them a days rest & let them dry on a shoe tree if possible so that the shoes stay in shape. If you use a shoe tree made from wood the moisture in the shoe can be absorbed by the shoe tree to a certain extent. Adjustable Shoe Trees These shoe trees can be adjusted to make your shoes a more perfect fit & even stretch shoes which are slightly too small. With holes at the front to allow air to circulate. Beech wood. Sizes 40–47 (612;–12). Size Item No. 40 (6, 5) 101675 41 (7) 101676 42 (8) 101677 43 (9) 101679 44 (9, 5) 101679 45 (10, 5) 101680 46 (11) 101681 47 (47) 101682