Brush off grit after you wear them, dry wet leather slowly at room temperature, condition only when the leather looks dry, and match every product to the surface: smooth, oiled, suede, or nubuck. Most damage comes from heat, salt, and too much product, not from too little care.

Good leather doesn't need constant treatment. Too much cleaning and conditioning does as much harm as neglect.

The right product depends on three separate things: the surface (smooth, suede, or nubuck), the finish on top of it (open and absorbent, or coated), and the tannage underneath. The word "leather" doesn't tell you which product to use, and neither does the animal it came from.

First, identify the leather

Before you apply anything, find out what surface you have. Put one drop of water on a hidden spot. If it soaks in and darkens the leather, the finish is open and absorbent, and conditioner will darken it too, so use less and test first. If the drop beads, the surface is coated and needs only a thin coat of cream, buffed off. If the color lightens when you bend the leather and comes back when you rub it, it's a pull-up leather, rich in oil or wax, and it wants a matching dressing.

The everyday routine is mostly brushing

Dust, grit, and dried mud are abrasive. Grit left in a flex crease scratches the grain every time the shoe bends. On welted and stitchdown shoes, dirt also packs into the seam where the upper meets the sole, so clear it with a small stiff brush.

For smooth leather, a horsehair brush after wear is usually enough. Keep a separate small brush for applying polish, a stiffer one for welts and lug soles, and a suede brush only for suede and nubuck. You don't need conditioner every time the shoes leave the house.

Use shoe trees for shape and drying

Creases set as the leather dries after wear. A shoe tree holds the vamp flat while that happens, so the creases stay shallower. Unfinished cedar trees also draw moisture out of the lining; lacquered or plastic trees only hold shape. Pick a tree that matches the toe shape and length of the shoe, so it supports a made-to-fit pair without stretching it.

Insert them after wear once you have checked that the shoe is not saturated. The tree should support the shoe without forcing it wider or longer.

If leather gets wet, dry it slowly

Don't put wet leather shoes near a radiator, under a hair dryer, or in direct sun. Wet leather shrinks and hardens at much lower temperatures than dry leather, and vegetable-tanned leather, which is what Rebels Market uppers are, is more sensitive to heat than chrome-tanned leather. Fast drying also pulls the oils out with the water, which leaves the leather stiff and prone to cracking.

Remove loose dirt, open the laces, take out any removable insoles, and stuff the shoe loosely with absorbent paper. Swap the paper when it gets damp, and don't pack it so tight that it stretches the upper. Stand leather-soled pairs on their side so air reaches the sole. Let them dry at room temperature for 24 to 48 hours, and don't wear them until the sole is fully dry. A wet leather sole wears through quickly and can lose its shape.

A soaking carries some of the leather's oils out as it dries, so a light coat of conditioner afterwards is often worthwhile once the leather is fully dry. If a wet patch leaves a tide mark on absorbent leather, dampen the whole panel evenly up to the seam with a damp cloth and let it dry again, so it dries to one even tone.

Condition when the leather tells you it needs it

Smooth leather needs conditioner when the creases look lighter or chalky, fine cracks start to show across the main flex crease, or the leather feels papery when you bend it. Conditioner keeps leather from cracking. It can't close a crack that has already opened.

More is not better. Too much conditioner darkens leather, softens it past the point where it holds its shape, leaves a greasy surface, and attracts dirt. Cream emulsions are light and suit dress shoes. Wax-based dressings sit closer to the surface and add water resistance, which suits work boots. Pure oils soak in deepest and soften the most, so use them sparingly, if at all, on shoes that need to keep their structure.

Test any unfamiliar product on a hidden spot first, especially on light colors, pull-up leathers, and absorbent finishes. Rebels Market smooth uppers are vegetable-tanned full-grain leather from certified tanneries. That leather takes conditioner readily, darkens slightly when you apply it, and develops a patina with wear, so start with less than you think you need.

Conditioner and polish do different jobs

Conditioner replaces the oils that keep smooth leather flexible. Cream polish is pigment and a little wax in a soft base, so it adds color, light protection, and a soft shine. Wax polish is mostly hard wax and builds a higher shine and a tougher surface. Wax suits the toe cap and heel counter, which are stiffened and barely flex.

Do not build heavy wax over the main flex point of a shoe. Thick wax layers can crack as the leather bends.

Suede and nubuck need a different routine

Don't use smooth-leather cream polish, conditioner, or oil on suede or nubuck. They flatten the nap, darken the surface, and change the look for good.

Suede is the fibrous flesh side of the hide, brushed into a nap. Nubuck is the grain side, lightly sanded. Both soak up oil and water easily. Spray a suede and nubuck protector before the first wear; it slows staining but doesn't make the leather waterproof. Let mud dry, then brush it off gently. Use a specialty cleaner only when needed, and a suede eraser for small marks. For a water mark, dampen the whole panel evenly with a damp cloth, then brush the nap up as it dries.

Salt and road residue should not sit on the leather

Road salt dissolves in slush, soaks into the leather, and dries into white crystals that pull moisture out. Left there, it stiffens the leather and leads to cracks along the creases. Wipe it off the same day with a cloth dampened in water with a little white vinegar, or with a salt remover made for leather. Then wipe with clean water, dry the shoes slowly, and condition lightly once they're dry.

Test vinegar or any cleaner on a hidden spot first, especially on absorbent leather.

Rotate footwear when you can

Feet sweat into the lining and insole every time you wear a pair. The salts in sweat break leather down if it never dries out fully, and a leather insole needs a day or more to dry. Rotating between two pairs gives each one that time.

What not to do

• Do not soak leather to make it softer.
• Do not use direct heat to speed drying, and do not wear leather-soled shoes until the soles are fully dry.
• Do not use cooking oil, household oil, or petroleum jelly as conditioner. Food oils can go rancid and smell, and petroleum products leave a residue. Purpose-made leather oils are different, but they still darken and soften leather.
• Do not assume a cleaner that works on smooth leather is safe for suede.
• Do not condition simply because a calendar says it is time. Look at the leather.
• Do not scrub natural grain variation as if it were dirt.

A practical routine

Care should help a good shoe age, not keep it looking unworn

Leather develops flex lines, color changes, scuffs, and patina with use. Patina is the darkening and deepening of color that open, vegetable-tanned leather picks up from light, handling, and conditioner. Heavily coated leathers stay more uniform and show less of it. Care keeps the material clean, flexible, and serviceable while it ages.