How to Wash Men's Underwear to Keep It Fresh and Durable

Quick answer

Wash men's underwear in cold water on a gentle cycle with a mild detergent, then air-dry or tumble on low. Turn garments inside out to protect the fabric and waistband. Avoid hot water, chlorine bleach, and fabric softener, which break down elastic and cause fading. This routine keeps underwear fresh and extends its life.

Your underwear takes a beating: sweat, friction, and frequent washing. The right laundry routine keeps it fresh and comfortable without wearing it out. This guide walks you through how to wash men's underwear step by step, with practical underwear care tips for boxer briefs, trunks, and woven shorts.

We'll cover water temperature, detergent choice, drying methods, and common mistakes that shorten the life of your underwear. Whether you wear performance boxer briefs or classic cotton boxer shorts, these habits will help you get more wear from every pair.

Sort and prepare your underwear

Start by separating underwear from heavy items like jeans or towels, which can abrade delicate fabrics. Turn each pair inside out to protect the outer surface and waistband. Check care labels for any specific instructions—most CDLP underwear uses Tencel™ lyocell, which benefits from gentle handling.

Empty pockets if your underwear has them (rare, but some boxer shorts do). Close any hooks or zippers on other garments to prevent snags. If you're washing performance underwear, keep it separate from cotton to avoid lint transfer.

• Turn underwear inside out to reduce pilling and fading.
• Wash dark colors separately from lights to prevent dye transfer.
• Use a mesh laundry bag for delicate items like performance boxer briefs.

Choose the right water temperature and cycle

Cold water is best for all underwear fabrics. It prevents shrinkage, reduces color fading, and saves energy. Hot water can break down elastic fibers in waistbands and cause cotton to shrink. Use a gentle or delicate cycle to minimize agitation.

If your machine has a specific setting for delicates, use it. For hand-washing, fill a basin with cold water and gently squeeze the soap through the fabric—don't wring or twist.

• Always select cold water (below 30°C/85°F).
• Use a gentle cycle with low spin speed.
• For hand-washing, soak for 5–10 minutes, then rinse thoroughly.

Pick a mild detergent—and skip the extras

Use a mild, liquid detergent free of dyes and perfumes. Powder detergents can leave residue on synthetic blends, which may cause irritation. Avoid chlorine bleach and fabric softener: bleach damages fibers, and softener coats them, reducing breathability and moisture-wicking properties.

If you need to disinfect, use a laundry sanitizer formulated for delicate fabrics, or add a half-cup of white vinegar to the rinse cycle. Vinegar helps remove odors and softens water without leaving a scent.

• Choose a gentle, liquid detergent.
• Never use chlorine bleach or fabric softener.
• For odors, add white vinegar to the rinse cycle.

Wash and dry with care

After washing, remove underwear promptly to prevent wrinkles and mildew. Air-drying is ideal: lay flat or hang to dry away from direct sunlight, which can fade colors. If you use a dryer, choose low heat and remove items while slightly damp to avoid over-drying.

High heat is the enemy of elastic and Tencel™ lyocell. It can cause waistbands to lose stretch and fabric to become stiff. For best results, air-dry your underwear whenever possible.

• Air-dry whenever possible to extend life.
• If using a dryer, select low heat and remove promptly.
• Avoid direct sunlight to prevent fading.

Store and rotate for longevity

Store clean, dry underwear in a cool, dry place. Fold boxer briefs and trunks neatly to prevent stretching. Avoid cramming them into tight drawers, which can distort waistbands. Rotate your pairs so no single pair gets worn and washed excessively.

For travel, use a packing cube or separate pouch to keep underwear away from dirty shoes or damp items. This simple habit keeps them fresh and ready to wear.

• Fold rather than hang to maintain shape.
• Rotate pairs to distribute wear evenly.
• Keep underwear separate from heavy or damp items in luggage.

Your step-by-step underwear laundry routine

1. Step 1: Sort and turn inside out: Separate underwear from heavy items and turn each pair inside out. This protects the fabric surface and waistband from friction. Checkpoint: Are dark colors separated from lights? If not, you risk dye transfer.
2. Step 2: Use cold water and gentle cycle: Set your washing machine to cold water and a delicate cycle. If hand-washing, use a basin of cold water and gently agitate. Mistake to avoid: Using hot water, which shrinks cotton and damages elastic.
3. Step 3: Add mild detergent, skip softener and bleach: Use a liquid detergent free of dyes and perfumes. Never add chlorine bleach or fabric softener, as they degrade fibers and reduce breathability. Checkpoint: Is your detergent mild and residue-free? If unsure, opt for a sensitive-skin formula.
4. Step 4: Air-dry or tumble low: Remove underwear from the washer promptly. Air-dry flat or hang away from direct sunlight. If using a dryer, select low heat and remove while slightly damp. Mistake to avoid: Over-drying on high heat, which causes stiffness and waistband failure.
5. Step 5: Store folded and rotate: Fold clean underwear neatly and store in a cool, dry drawer. Rotate pairs to distribute wear evenly and extend the life of each garment. Next step: Apply these habits to all your underwear, from boxer briefs to long johns.

Fabric care notes for CDLP underwear

• 12 × Boxer Trunk: Made of Tencel™ lyocell—a fibre derived from certified renewable wood sources—providing silk-like softness, superior breathability, and natural moisture wicking properties. Due to the natural characteristics of the fabric, this garment will slowly and gracefully fade with age. Tencel™ lyocell is sensitive to heat and harsh chemicals, so cold washing and air-drying help preserve its softness and moisture-wicking performance. The natural fading is a characteristic, not a defect, but proper care slows it down.
• 3 × Cotton Boxer Shorts Classic: Made of Tencel™ lyocell—a fibre derived from certified renewable wood sources—providing breathability, silk-like softness and drape. All seams are turned and reinforced to avoid chafing. The reinforced seams are durable, but the Tencel™ lyocell fabric still benefits from gentle washing to maintain its drape and prevent pilling. Turn them inside out before washing to protect the seams.
• Merino Blend Long Johns: Made from a premium and ethically sourced blend of Merino Wool and Tencel™ lyocell, these Long Johns offer unparalleled softness and functionality. The Merino Wool provides thermal regulation and anti-odor benefits, while Tencel™ lyocell—derived from certified renewable wood sources—delivers a silk-like softness. Merino wool is naturally odor-resistant, so you can wear them multiple times between washes. When you do wash, use cold water and a wool-safe detergent, then air-dry flat to avoid stretching.

Washing men's underwear properly is simple: cold water, mild detergent, gentle cycle, and air-drying. These steps keep fabrics soft, waistbands stretchy, and colors true. By avoiding heat and harsh chemicals, you'll extend the life of every pair—whether it's a daily boxer trunk or a Merino blend long john. A little care goes a long way toward lasting comfort.