How to Wash and Care for Kids' Swimwear: Keeping Swim Trunks and Bikinis in Shape

Quick Answer

Rinse swimwear in cold fresh water immediately after swimming, hand wash with a gentle detergent, and lay flat to dry away from direct sun. Avoid wringing, machine washing, and fabric softeners to prevent chlorine, salt water, and sand from damaging the fabric and elastic.

Kids' swimwear goes through a lot: chlorine, salt water, sand, sunscreen, and constant pulling. Without proper care, swim trunks and bikinis can fade, stretch out, or lose their shape after just a few beach days. The good news is that a simple routine can keep them looking bright and fitting well all season.

This guide walks you through the best way to wash and dry children's swimwear, including how to remove chlorine and salt water damage, plus tips for bikini bottoms care. You'll also learn what to avoid—like hot water and dryers—so your child's favorite suit lasts longer.

Why Chlorine and Salt Water Damage Swimwear

Chlorine and salt water are tough on swimsuit fabrics. Chlorine can break down elastic fibers, causing swim trunks to lose their stretch and sag. Salt water can leave crystals that dry out the fabric and make it stiff. Sand can also act like tiny abrasives, wearing down the material over time.

The key is to rinse swimwear as soon as possible after swimming. Fresh water helps wash away chlorine, salt, and sand before they have a chance to set in. Even a quick rinse in a public shower or a bottle of water can make a big difference.

• Always rinse swimwear in cold fresh water before washing.
• Avoid hot water, which can set stains and damage elastic.
• Don't leave wet swimwear in a bag or pile—mildew can develop.

Hand Washing vs. Machine Washing

Hand washing is the gentlest option and is recommended for most kids' swimwear. Fill a sink or basin with cold water and add a small amount of mild detergent. Swish the suit gently for a few minutes, paying attention to areas with sunscreen or sand. Rinse thoroughly until the water runs clear.

If you prefer machine washing, use a delicate cycle with cold water and place the swimwear in a mesh laundry bag. Skip fabric softeners—they coat the fibers and reduce stretch. Also avoid bleach and harsh stain removers, which can fade colors.

• Use a detergent that is free of dyes and fragrances for sensitive skin.
• Turn swimwear inside out before machine washing to protect the outer fabric.
• Never wring or twist swimwear—press out excess water gently.

Drying Swimwear the Right Way

Drying is just as important as washing. High heat from a dryer can melt or shrink the synthetic fabrics used in swimwear and ruin the elastic. Instead, lay the suit flat on a clean, dry towel and roll it up to absorb excess water. Then reshape it and lay it flat to air dry.

Avoid hanging swimwear by the straps or waistband, as the weight of the wet fabric can stretch them out. Also, keep it out of direct sunlight, which can fade colors. A shaded, well-ventilated spot is ideal.

• Lay swimwear flat to dry, not on a hanger.
• Dry in the shade to prevent sun fading.
• Make sure swimwear is completely dry before storing.

Step-by-Step Swimwear Care Routine

1. Rinse immediately: After swimming, rinse swimwear in cold fresh water to remove chlorine, salt, and sand. Do this even if you plan to wash later. A quick rinse prevents damage from setting in.
2. Hand wash with mild detergent: Use cold water and a gentle detergent. Swish for a few minutes, then rinse thoroughly. Avoid hot water and harsh chemicals.
3. Press out water, don't wring: Gently press the suit to remove excess water. Never twist or wring, as this can stretch the fabric. Roll in a towel to speed up drying.
4. Dry flat in shade: Lay the swimwear flat on a towel or drying rack in a shaded area. Avoid direct sun and dryers. Air drying preserves elastic and color.
5. Store completely dry: Make sure the suit is fully dry before folding or hanging. Store in a cool, dry place. Prevents mildew and keeps it fresh for next time.

Products That Help with Swimwear Care

• Magic Water Reusable Color-in Pad: Reusable design: simply fill with water and watch colors appear, then let it dry and start over. Encourages creativity and fine motor skills through drawing and coloring. After a day at the pool, this mess-free activity keeps kids entertained while you handle swimwear care—no extra cleanup needed.
• Activity Craft Kit: Includes multiple craft projects and materials for hours of imaginative play and fine motor skill development. Perfect for quiet time after swimming, giving you a few minutes to properly rinse and dry swimwear before it sits too long.

Caring for kids' swimwear doesn't have to be complicated. A quick rinse, a gentle hand wash, and proper air drying will keep swim trunks and bikinis looking bright and fitting well all summer. With these simple steps, you can extend the life of your child's favorite swimwear and save money in the long run.