A shoe tree is a shaped form you slide into a shoe once you take it off. It sounds like a fussy detail, and for a pair of canvas trainers it probably is. For leather shoes it is the single cheapest thing you can do to make them last longer, because it fights the two forces that age leather fastest: moisture and creasing.
What a shoe tree actually does
Your foot changes a shoe every time you wear it. It bends the toe box, stretches the upper, and leaves behind perspiration that soaks into the lining. A shoe tree steps in while the leather is still warm and pliable, and holds it in the shape you want it to keep.
- It holds the shape. Leather dries in whatever position you leave it. Left empty, a shoe dries curled, with the toe pulled up and the sides collapsed inward.
- It pulls out moisture. Feet perspire a great deal over a day of wear. Damp lining is what breeds odor and what makes leather stiffen and crack over time.
- It smooths creases. The diagonal wrinkles across the vamp never disappear entirely, but a tree stretches them flat rather than letting them set into permanent folds.
- It makes polishing easier. A shoe held firm and taut takes cream and wax far more evenly than one you have to grip and squash while you work.
A shoe tree is not a shoe stretcher
These two are often sold side by side and the names get used interchangeably, but they do opposite jobs. A shoe tree maintains the size and shape a shoe already has. A shoe stretcher is designed to make a shoe permanently bigger, usually with a screw mechanism and sometimes with plugs that push out a specific pressure point over a bunion or a wide joint.
If you buy a stretcher expecting a tree, you will slowly enlarge shoes that fit you perfectly well. Buy the one that matches the problem you actually have.
Wood or plastic
Wooden shoe trees
Wood is the better material, and unfinished cedar is the reason. Raw cedar is porous, so it draws moisture out of the lining rather than sealing it in, and it carries a natural aroma that helps keep stored shoes smelling clean. Wood is also heavy and rigid enough to genuinely push a crease flat instead of merely resting inside the shoe.
The trade-offs are cost and weight. Wooden trees are the more expensive option and they are far too heavy to pack, but a good pair outlasts several pairs of shoes, so the cost spreads thin.
One detail matters when buying: the cedar should be unfinished. A varnished or lacquered wooden tree looks smarter on the shelf and absorbs almost nothing, which removes half the point.
Plastic shoe trees
Plastic trees are light, cheap and easy to wipe clean, and they hold shape perfectly well. What they cannot do is absorb anything, so moisture stays in the shoe and simply evaporates on its own schedule.
That makes plastic a sensible choice for travel, where weight in a suitcase is the binding constraint, and for shoes you are not especially worried about. For everyday leather shoes at home, wood is worth the difference.
The shapes you will be choosing between
- Full-last trees reproduce the whole shape of a foot, toe block and heel, joined by a sprung or screw-adjusted stem. They give the best result and cost the most.
- Split-toe trees divide the toe block down the middle so it widens as it is pushed in. This is the type worth having if your shoes vary in width, because one tree adapts to several pairs.
- Spring-loaded trees use a coiled or barrel spring in the stem to hold constant pressure between toe and heel. They are quick to insert and forgiving about length.
- Travel trees are shortened forms that support the toe box only. They are a compromise, but a compromise that fits in hand luggage.
Getting the fit right
A shoe tree should fill the shoe, not fight it. Slide it in and it ought to seat firmly with a little resistance at the end. If you have to force it, or the heel of the shoe visibly bulges outward, the tree is too long and you are slowly stretching the shoe you meant to protect. If it rattles or drops in with no resistance at all, it is too small to do anything useful.
Trees are sold in sizes, and they are not unisex. Buy to your own shoe size, and check the width if you wear a narrow or wide fitting.
How to use them
Put trees in soon after you take the shoes off, while the leather is still warm and damp and will take the shape you give it. Leave them in whenever the shoes are not being worn. There is no benefit to taking them out, and every hour they spend in the shoe is an hour the toe box is not curling.
The one exception is a soaked shoe. If you have been caught in heavy rain, let the shoe dry slowly at room temperature away from any direct heat, then insert the tree. Forcing a form into sodden leather and leaving it near a radiator is how shoes crack.
Trees are only part of looking after footwear. Wet weather in particular needs its own routine, covered in our guide to caring for your feet in the monsoons, and the shoes worth protecting in the first place are set out in our overview of footwear for women.
Ideally you want one pair of trees for every pair of good leather shoes. If that is more than you want to buy, prioritize the shoes you wear most and the ones that cost the most to replace, and rotate the trees across the rest.
Common mistakes
- Buying trees a size up because they were the ones in stock. Oversized trees stretch shoes out of shape.
- Choosing varnished wood over raw cedar. It looks better and works worse.
- Leaving shoes empty overnight after a long day, which is exactly when a tree does its most useful work.
- Using trees to fix a shoe that is genuinely too tight. That is a stretcher’s job, or a cobbler’s.
Frequently asked questions
Do I need shoe trees for trainers?
Generally no. Trainers are built on soft, unstructured uppers that are not trying to hold a shape, and creasing in canvas or synthetic mesh is not the same problem it is in leather. Leather sneakers are the exception and benefit from a light tree.
Can one pair of trees serve several pairs of shoes?
It can, and split-toe or spring-loaded trees are the ones flexible enough to move between pairs. You lose the main benefit though, because the shoes sitting empty are the ones drying into the wrong shape.
How long should trees stay in?
Indefinitely. Leave them in until the next time you wear the shoes.
Does the cedar smell wear off?
It fades over months as the surface pores clog with absorbed oil and dust. Light sanding with fine sandpaper opens the grain again and brings both the scent and the absorbency back.
