How to Clean Hiking Boots (All Materials)
Mud and dirt don't just look bad — they actively break down your boots. Abrasive grit works into stitching and seams, trapped moisture deteriorates leather and accelerates delamination, and caked mud blocks the waterproof membrane's ability to breathe. A 15-minute clean after every muddy hike adds years to the life of a good pair of boots.
Why Cleaning Boots Matters
Most hikers think of cleaning as cosmetic. It isn't. Here's what actually happens to uncleaned boots:
- •Dirt breaks down materials. Grit particles are abrasive at a microscopic level. They work into seams and flex points, cutting through thread and leather fibers over time.
- •Mud traps moisture. Caked mud keeps the boot interior damp long after a hike, encouraging mold, odor, and deterioration of the lining foam.
- •Dirt blocks waterproofing. A film of grime on the upper prevents DWR from functioning and reduces how well a waterproof-breathable membrane can release moisture from inside the boot.
- •Leather dries and cracks. Dirty leather loses its conditioning oils faster and becomes stiff and prone to cracking at flex points — the toe box and instep are the most vulnerable areas.
What You'll Need
- •Soft-bristle brush — a dedicated boot brush or an old nail brush. Avoid hard wire brushes, which scratch leather.
- •Old toothbrush — for the lug pattern on the outsole and seams.
- •Mild soap or boot cleaner — Nikwax Footwear Cleaning Gel or Gear Aid Revivex Boot Cleaner. Avoid household detergents, which can strip leather oils.
- •Clean cloths or sponge — for applying cleaner and wiping down the upper.
- •Boot conditioner (leather boots only) — Nikwax Leather Conditioner, Gear Aid Revivex Boot Conditioner, or traditional Leather Dubbin.
- •DWR spray (optional) — for waterproof boots after cleaning.
Step-by-Step Cleaning Method
- 1
Remove laces and insoles
Take out the laces and insoles before you start. Laces can be washed separately in warm soapy water. Insoles should be cleaned and air dried separately — they are the primary source of boot odor.
- 2
Knock off loose dirt
Bang the soles together over a bin or tap them on a hard surface to dislodge loose mud. Use the dry stiff brush to knock off any remaining dried mud from the uppers and lugs before adding water.
- 3
Wet brush and apply mild soap to the uppers
Wet the soft-bristle brush and apply a small amount of Nikwax Footwear Cleaning Gel or mild soap. Work the brush in circular motions across the entire upper, paying extra attention to seams (where dirt accumulates) and the collar around the ankle (where sweat and grime collect most heavily).
- 4
Rinse — don't soak
Wipe the boot with a damp cloth to remove soap and loosened dirt. Avoid submerging the boot or holding it under running water for extended periods — excessive moisture saturates the midsole foam and is slow to escape. Repeat the scrub-and-wipe cycle until no dirt is visible.
- 5
Clean the outsole and lug pattern
Use the old toothbrush to work into the lug grooves on the outsole. Packed mud in the lugs reduces traction on your next hike. Work around the entire outsole and the welt (the junction between the upper and sole).
- 6
Air dry away from direct heat
Place boots in a well-ventilated room at room temperature. Stuff loosely with newspaper or paper towels to absorb moisture and help the boot hold its shape. Replace the paper every hour for wet boots. Never use a radiator, campfire, or tumble dryer — see the "What NOT to do" section below.
Cleaning by Material Type
Full-Grain Leather Boots
Leather is the most durable upper material available but requires the most maintenance. After cleaning and drying, leather boots must be conditioned to prevent the leather from drying out and cracking.
Apply a dedicated leather conditioner — Nikwax Leather Conditioner, Gear Aid Revivex Boot Conditioner, or traditional Leather Dubbin — to the clean, slightly damp boot using a cloth or sponge. Work it in with circular motions, paying particular attention to the toe box and instep where the leather flexes most. Allow to absorb for 15 minutes, then buff off the excess.
Avoid oil-based conditioners like mink oil — they over-soften the leather and can reduce the boot's support structure. Dubbin is a good traditional option but heavy use can darken the leather permanently.
Synthetic and Mesh Boots
Synthetic uppers and trail runners with mesh panels are more forgiving to clean. They don't require conditioning and dry considerably faster than leather.
Follow the general cleaning steps above. For mesh panels, use a soft brush with mild soap — the mesh can trap dirt deeply. Rinse thoroughly, as soap residue in mesh is difficult to remove.
Do not apply leather conditioner to synthetic boots — it can clog mesh panels and reduce breathability.
Waterproof Boots (Gore-Tex and Proprietary Membranes)
Waterproof boots have a membrane laminated inside the upper that stops water from entering. The outer face fabric has a DWR coating that helps water bead off rather than soaking the upper and adding weight.
Clean as normal — but after drying, apply a DWR spray to restore water beading. Nikwax Footwear Waterproofing Spray or Granger's Performance Repel work well. Apply to a damp boot, wipe off excess, and allow to air dry.
Important: do not use oil-based cleaners or conditioners on waterproof boots with mesh panels or Gore-Tex laminates — oil degrades the waterproof membrane over time. Stick to water-based cleaning products.
What NOT to Do
- ✗Washing machine — the agitation damages adhesive bonds between the upper and midsole, can warp midsole foam, and will crack leather.
- ✗Tumble dryer — heat causes leather to crack, shrinks synthetic materials, and degrades waterproof membrane adhesives.
- ✗Direct heat — radiators, campfires, and boot-shaped heaters all dry boots too fast, causing leather to stiffen and crack and synthetic uppers to warp.
- ✗Harsh detergents — household cleaning products and dish soap strip the oils from leather and degrade DWR coatings. Use mild soap or a dedicated boot cleaner.
- ✗Soaking the boots — filling the boot with water or leaving it submerged saturates the midsole foam, which takes days to dry and can develop mold.
After Cleaning: The Full Post-Hike Routine
- 1
Re-lace the boots once clean and dry, using the same lacing pattern you arrived with.
- 2
Re-insert dry insoles only after both the boot interior and the insoles are completely dry.
- 3
Apply DWR spray if waterproof — do this every 3–5 cleans to maintain the water-beading performance.
- 4
Apply conditioner if leather — condition while the leather is still very slightly damp for best absorption.
- 5
Store in a cool, dry place away from direct sunlight. UV light degrades synthetic materials and dries leather.
How Often to Clean Hiking Boots
The short answer: more often than most people do.
- •After every muddy hike — a quick brush-off and damp cloth wipe takes 10 minutes and removes the grit that causes the most abrasive damage.
- •Deep clean every 5–10 uses — a thorough clean with boot-specific cleaner, re-conditioning of leather, and DWR re-application if needed.
- •Before storing for the season — always clean, dry, and condition (leather) before long-term storage.
Related Gear and Guides
Frequently Asked Questions
Can I put hiking boots in the washing machine?
No. Washing machines damage the adhesives that bond the upper to the midsole, can warp the midsole foam, and will crack leather. The agitation also degrades waterproof membrane laminates like Gore-Tex. Always hand-clean hiking boots.
How do I dry hiking boots fast?
Remove the insoles and laces, loosely stuff the boots with newspaper or paper towels (which absorb moisture), and place them in a warm room with good airflow. Replace the paper every hour. A boot dryer on a low setting also works well. Never use direct heat — radiators, campfires, or tumble dryers crack leather and delaminate waterproof membranes.
How do I remove smell from hiking boots?
Remove the insoles and wash them separately with mild soap and water — they are the main source of odor. Sprinkle baking soda inside the boots and leave overnight, then shake out. For persistent smell, activated charcoal inserts or cedar shoe trees work well. Always store boots with the insoles removed so they can air dry fully between hikes.
Do I need to condition synthetic hiking boots?
No. Conditioning products are designed for leather and won't benefit synthetic or mesh uppers. For synthetic boots, cleaning and re-applying a DWR spray after cleaning is the main maintenance step. Leather conditioner on synthetic boots can actually clog mesh panels and reduce breathability.
How do I clean the inside of hiking boots?
Remove the insoles and wash them separately with mild soap and water. For the boot interior, mix a small amount of mild soap with water, apply with a damp cloth or soft brush, and wipe down. Don't soak the interior. Allow boots to air dry completely with insoles out before reinserting.
How long do hiking boots last with proper care?
Quality hiking boots typically last 500–1,000 miles with proper care — roughly 3–5 years for regular weekend hikers. The limiting factors are usually midsole compression and outsole wear, not the upper. Regular cleaning, conditioning leather, and storing boots properly away from direct heat all extend lifespan significantly.
Jake Thornton
Jake is an outdoor gear writer and backpacking guide with over a decade of experience testing equipment in alpine and backcountry environments. He specializes in gear maintenance, insulation technology, and helping hikers get more life out of their kit.