How to Wash Swimsuits: Extend Lifespan and Prevent Fading

Swimsuits break down quickly from chlorine, sunscreen oils, salt water, and UV exposure. The elastic becomes loose, colors fade, and linings deteriorate after just a few seasons. Proper washing immediately after swimming can double the lifespan of a suit, often adding years to its usability.

This guide covers hand-washing techniques, materials care, and storage to keep swimsuits in shape.

Quick Answer: How to Wash Swimsuits

• Rinse with fresh water immediately after swimming (before chlorine or salt dries).
• Hand wash in cool water with mild detergent (never machine wash).
• Gently squeeze water; never wring or twist fabric.
• Lay flat on a towel to air dry in shade (never sunlight or heat).
• Never use a machine dryer.

Why Swimsuits Deteriorate Quickly

Swimsuit fabrics (typically nylon or polyester blends with spandex) are engineered for water exposure but are damaged by chemicals, salt, heat, and UV light. Chlorine oxidizes dyes and degrades elastic fibers. Salt water stiffens fabric. Sunscreen and body oils create buildup. Machine washing, hot water, and high-heat drying all accelerate degradation. With proper care, swimsuits can last 3–5 years instead of 1–2 seasons.

Step-by-Step: Hand Wash Your Swimsuit

Step 1: Rinse Immediately After Swimming

Before chlorine or salt water dries on the suit, rinse with fresh water at a sink or shower. This removes the harsh chemicals while they're still wet and easier to flush away. Do not wait until you get home; immediate rinsing is the single most important step.

Step 2: Fill a Sink or Basin with Cool Water

Use cool water, not cold, to avoid shocking the fabric. Add a tiny amount of mild detergent (baby shampoo, delicate wash, or sport detergent). One teaspoon per sink is usually enough.

Step 3: Submerge and Soak

Soak the suit for 5–15 minutes. This allows detergent to reach sunscreen, oils, and salt buildup without requiring harsh agitation.

Step 4: Gently Agitate (Do Not Rub)

Very gently swish the water around the suit. Do not rub, scrub, or twist. The elastic is delicate and will stretch permanently if manhandled. Treat the suit like a delicate lingerie item.

Step 5: Rinse Thoroughly

Drain the soapy water and refill the sink 2–3 times with fresh cool water, gently agitating each time until the water runs clear. Residual detergent can build up on the suit if not fully rinsed.

Step 6: Gently Press Out Water

Gently press the suit against the sink to remove water. Never wring, twist, or squeeze hard. You can roll it in a clean, dry towel and press to absorb extra moisture, but avoid twisting.

Step 7: Lay Flat to Dry

Spread the suit flat on a clean, dry towel in a shaded area. Never hang (stretches the suit) or place in direct sunlight (fades colors and damages spandex). Flat drying prevents stretching and allows even drying.

Step 8: Store Flat or Rolled

Once dry, fold gently and store in a cool, dry place away from sunlight. Never store while damp.

Swimsuit Material Guide

Material	Care Notes	Durability
Nylon with spandex	Hand wash only; spandex loses elasticity with heat and harsh washing	3–4 years with proper care
Polyester with spandex	Slightly more durable than nylon; still requires hand washing and cool water	4–5 years with proper care
High-end luxury fabrics	Often more delicate; hand wash in lukewarm water only	2–3 years due to delicate construction

What Destroys Swimsuits (Avoid These)

• Machine washing: Agitation and friction damage spandex permanently. Hand wash only.
• Hot or warm water: Heat causes elastic to relax and colors to fade. Always use cool water.
• Machine dryer: Heat melts spandex and weakens fibers. Air dry only, flat, in shade.
• Direct sunlight while drying: UV fades colors and damages spandex. Dry in shade or indoors.
• Wringing or twisting: Stretches elastic permanently. Gently press water out instead.
• Fabric softener: Coats spandex and reduces stretch. Never use.

Common Mistakes to Avoid

• Not rinsing immediately: Chlorine and salt set into fabric if left to dry. Rinse same-day before heading home.
• Machine washing to save time: Saves 5 minutes today but shortens lifespan by 2–3 years. Hand wash takes 5 minutes.
• Hanging wet suit to dry: Weight of water stretches elastic permanently. Always lay flat.
• Storing wet or damp: Creates mildew. Ensure 100% dry before storing.
• Using harsh detergents: Regular laundry detergent is too strong. Use mild detergent or baby shampoo.

Related Guides

• How to Care for Delicate Fabrics
• How to Remove Chlorine Smell From Clothes

FAQ

Final Takeaway

Swimsuits last 3–5 years with proper care, but only 1–2 seasons with improper care. The key is immediate rinsing after swimming, gentle hand-washing in cool water, and flat air-drying in shade. These simple steps transform suit lifespan dramatically.

CTA: This week, rinse your swimsuit immediately after swimming and wash it by hand—your next suit will thank you with years of wear.

Sources

• Better Homes and Gardens: Swimsuit Care
• The Spruce: How to Wash Swimsuits

1. Fill sink with cool water.
2. Add a small amount of mild detergent.
3. Soak 10 minutes and gently swish.
4. Rinse thoroughly until water runs clear.
5. Press water out in towel and lay flat.

If you swim frequently, use a gentle swimwear-safe detergent to help remove chlorine residue.

Mistakes to Avoid

• Leaving suit wet in a bag for hours.
• Machine washing with jeans or rough fabrics.
• Drying in direct sun for long periods.

Related Laundry Guides

• How to Do Laundry for Beginners
• Laundry Symbols Explained
• How Much Laundry Detergent to Use
• Cold vs Hot Water for Laundry
• Should You Use Fabric Softener?

Need a Quick Laundry Plan?

Still unsure what to do for your fabric or stain type? Browse all guides or contact Olivia for a direct recommendation.

Extra FAQ

What is the safest first adjustment if this method does not work?

Change only one variable first, usually temperature or pre-treatment strength, then test again to isolate what improves results.

How do I avoid fabric damage during repeat attempts?

Use lower heat, shorter cycles, and verify care labels before each retry. Avoid stacking multiple aggressive treatments in one wash.

Can hard water affect this process?

Yes. Hard water can reduce detergent effectiveness and leave residue, so dosing and rinse quality become more important.

Should I air dry or machine dry after treatment?

Air drying is safer for uncertain fabrics; machine dry only if label-safe and at the lowest effective heat setting.

How can I keep results consistent in future loads?

Save your successful settings (cycle, detergent amount, temperature, and drying method) and repeat that exact sequence.