How to Wash Aramid-Lined Motorcycle Jeans Without Ruining Them

Aramid fiber (Kevlar® is the best-known brand) is very strong, but it is sensitive to UV light and chlorine bleach, and the garment around it (denim shell, seams, lining and protector pockets) needs gentle handling. Wash cold, inside-out, with mild detergent, and air dry out of direct sun: no bleach, no fabric softener, no tumble dryer. Always follow the care label on your own garment first. And wash less often than you think; denim doesn't need frequent washing.

Why the washing method matters

With regular jeans, washing is mostly cosmetic: you're removing dirt and smell. With aramid-lined riding jeans, the method matters more, because the wrong care can wear out the lining faster, distort the fit and shift the protector pockets. Aramid fibers (Kevlar® and Twaron® are two brands) and lined garments have specific vulnerabilities:

• UV light breaks down the fiber's molecular structure over time
• High heat can shrink the denim shell and lining unevenly, stress seams and damage bonded parts or stretch fibers
• Chlorine bleach chemically attacks aramid directly
• Repeated aggressive washing accelerates all of the above

Get the method right and the jeans keep their fit and finish for longer. Get it wrong repeatedly and you can wear out the lining and seams faster than normal riding would.

The correct washing method, step by step

Step 1: Wash inside-out

Turn the jeans inside out before washing. This protects the outer denim's color and surface from rubbing. Close zips and buttons first so they don't snag the lining.

Step 2: Remove the armor

Take out all removable protectors (knee, hip) before washing. Protectors don't go in the washing machine; water and agitation can degrade some foam types, and rigid inserts bang around and stress the pockets. Set them aside; wipe them down separately with a damp cloth if needed. On our men's motorcycle riding jeans and women's motorcycle jeans, the knee and hip inserts slide out of internal pockets.

Step 3: Cold water only

Wash at 30°C (86°F) or cold, unless your care label says otherwise. Cold water limits shrinkage and dye loss, and it cleans denim perfectly well for normal wear. You're not washing surgical scrubs.

Step 4: Mild detergent, no bleach, no softener

Use a small amount of mild liquid detergent. Avoid:

• Bleach (chlorine or oxygen): chemically attacks aramid fiber directly
• Fabric softener: coats the fibers and adds nothing for riding denim
• Detergents with optical brighteners or enzymes: harsher than needed; mild is better

A simple, mild liquid detergent is all you need. For raw denim specifically, a denim-specific detergent (Woolite Dark, or a dedicated denim wash) preserves the indigo better.

Step 5: Gentle cycle

Use the gentle/delicate cycle. Less agitation means less wear on both the denim and the lining. A garment bag adds further protection if you're washing with other items.

Step 6: Air dry, never tumble dry

This is the most important step. Don't put lined riding jeans in a tumble dryer: heat and tumbling can shrink the denim shell and the lining at different rates, pucker seams and pull protector pockets out of position. Hang them or lay them flat to air dry, ideally indoors or in shade. Which brings us to UV light:

Step 7: Dry out of direct sunlight

UV light degrades aramid fiber over time. Air drying is correct, but air drying in direct sunlight for hours partially defeats the purpose. Dry in shade, indoors, or somewhere out of prolonged direct sun. A few minutes of sun is fine; all-day sun exposure repeatedly over years is not.

How often should you actually wash them?

Less often than you think. Denim, including riding denim, does not need frequent washing. Many denim makers and enthusiasts recommend washing jeans far less than people assume.

General guidance:

• Normal commuting wear: Wash every 10-20 wears, or when visibly dirty / smelling.
• Hot weather, heavy sweat: More frequently: every 5-10 wears.
• Spot cleaning between washes: For small marks, spot-clean with a damp cloth rather than full-washing.

Each wash cycle puts some wear on both the denim and the lining. Washing less often (while staying hygienic) extends the life of the garment. The exception is sweat-saturated gear in hot climates, where hygiene wins; wash when it needs it. For raw selvedge denim specifically, the convention is to wash very rarely (some riders go months) to develop personal fade patterns. That's a styling choice; just make sure hygiene doesn't suffer.

The mistakes that wear out lined riding jeans

The five errors that wear out lined riding jeans fastest:

Tumble drying

The biggest one. Heat and tumbling can shrink the denim and lining unevenly and distort the protector pockets. Air dry, always.

Hot water washing

Hot water fades and shrinks denim and stresses seams and bonded parts. Cold or 30°C maximum, unless your care label says otherwise.

Bleach

Chlorine bleach weakens aramid fibers. Even oxygen bleach is harsher than the lining needs. Never bleach lined riding denim.

Ironing the lining

Don't iron the lining: high heat can damage bonded parts, labels and stretch fibers. If you must press the outer denim, iron the outside only, on a low setting.

Prolonged sun drying

UV is the slow killer. A few minutes of sun is harmless; repeatedly drying in all-day direct sun over years degrades the fiber. Dry in shade.

Caring for the armor separately

The removable protectors you took out before washing need their own (minimal) care:

• Wipe down with a damp cloth and mild soap if sweaty or dirty
• Air dry fully before reinserting, never store damp armor in the pockets
• Don't machine wash armor: water and agitation degrade some foam types
• Inspect periodically for cracking, deformation, or hardening (replace if the armor no longer flexes or sits properly)

Storing your jeans between rides

Day-to-day storage matters less than washing, but a few habits help:

• Hang or fold loosely: don't crease-fold in the same place for months (creates wear lines)
• Cool, dry, dark: same principles as washing: avoid heat and UV
• Don't store damp: fully dry before putting away to prevent mildew on the lining
• Reinsert armor for short-term storage; remove it for long-term (months) storage to avoid deforming the pockets

How to tell if the lining is worn

Signs that the lining is worn or damaged:

• Visible thinning or holes in the lining (hold up to light; significant light through the lining zones is a concern)
• Pilling or fraying of the aramid fiber
• Stiffening or discoloration of the lining from heat damage
• Age and heavy use: even with good care, fabrics and linings wear with use and UV exposure. There's no fixed lifespan, so inspect them regularly

If you see significant lining damage, stop riding in the jeans and replace them. And replace any riding jeans that have been through a crash, even if they look fine; damage to the lining isn't always visible.

Quick reference card

Save this:

Step	Do	Don’t
Temperature	Cold or 30°C	Hot / warm
Detergent	Mild liquid	Bleach, softener, brighteners
Orientation	Inside-out	Right-side-out
Armor	Remove first	Wash with armor in
Cycle	Gentle	Heavy / normal agitation
Drying	Air dry in shade	Tumble dry, direct sun
Pressing	Outside only, low heat	Iron the lining
Frequency	Every 10–20 wears	Wash after every ride

FAQ

• Can you machine wash aramid-lined motorcycle jeans?
• Yes: machine wash cold (30°C max), inside-out, on a gentle cycle, with mild detergent and no bleach or fabric softener. Remove the armor first. The machine itself isn't the problem; heat, bleach, and tumble drying are.
• Why shouldn't you tumble dry lined riding jeans?
• Heat and tumbling can shrink the denim shell and the lining at different rates, pucker seams and pull protector pockets out of position. Air drying out of direct sun is the safer choice. Always follow your garment's care label.
• How often should I wash my motorcycle jeans?
• Less often than regular clothes: every 10-20 wears for normal commuting, more often in hot, sweaty conditions. Denim doesn't need frequent washing, and each wash adds some wear. Spot-clean small marks between washes.
• Does washing damage aramid-lined jeans?
• Gentle washing (cold, inside-out, air dry out of the sun) is the best way to look after them. Chlorine bleach weakens aramid fibers, UV degrades them over time, and hot washes and tumble drying can shrink and distort the garment. Follow the care label and inspect the lining regularly.
• Can I use fabric softener on motorcycle jeans?
• It's best not to. Fabric softener coats the fibers and adds nothing for riding denim. Use only a mild liquid detergent.
• How long do aramid-lined motorcycle jeans last?
• There's no fixed lifespan; it depends on how much you ride, how you wash and store them, and UV exposure. Inspect the lining regularly, replace any jeans that have been through a crash regardless of appearance, and stop riding in jeans whose lining is visibly thinned or holed.