Shoe Trees have excellent moisture absorbency, gradually dry your shoes from the inside and reduce creasing of the vamp. Shoe Trees are an extremely important part of caring for your Crockett & Jones shoes. Our Shoe Trees offer 3 major benefits; They have excellent moisture absorbency, to gradually dry your shoes from the inside, they reduce creasing by supporting the uppers whilst your shoes are not being worn and they offer even support whilst cleaning and polishing your shoes. What size Shoe Tree should I order for the new Shoe Trees? For E fitting shoes We recommend buying a size 8 shoe tree for an 8E shoe/boot. For half sizes up to the nearest whole size. For G fitting shoes We recommend buying a size 9 shoe tree for both an 8E and 8.5E shoe/boot. For whole sizes, size up one whole size. For half sizes up to the nearest whole size.