What you need from a swimsuit depends on what you're doing in it. Relaxing poolside calls for comfort and something easy to care for. Serious training requires a fit that sticks with you and fabric that outlasts your workouts. Weekend beach trips call for comfort and flexibility so you can move easily in and out of the water. Find yours at Decathlon.
Fabric quality and fit go hand in hand. Look for chlorine-resistant materials that won't fade or lose shape quickly. The fit should be snug enough to reduce drag when you're swimming hard, but comfortable enough for all-day poolside lounging. Consider your main use, whether it's serious training or casual beach days, then pick a suit designed for that purpose.
Material
Pick your fabric based on how you actually use the pool. Chlorine-resistant polyester is the go-to for lap swimmers and frequent pool-goers, it handles regular chlorine exposure well and keeps its shape longer. Nylon blends feel silky and stretch nicely, perfect for leisurely swimming or holidays, though they need gentler washing. Polyester if you're a saltwater person, it holds up against sand, sun and salt exposure better than anything else. Think about your main scenario and choose accordingly.
Support
Check the support across the chest and torso, your swimsuit needs to feel supportive and secure during active swimming. The leg openings mustn't ride up or slip down every stroke. A swimsuit that moves around constantly becomes distracting. New fabric can feel a bit stiff, after a few sessions it usually feels softer and more comfortable. Rinse after every use to keep the elasticity in the fabric and extend its life.
Weight
Lightweight suits pack down smaller and dry faster, which is handy for travel or back-to-back swimming sessions. For home use where your swimsuit can air-dry overnight, weight matters less.
First-time buyers. Looking for a reliable swimsuit without overthinking it? Our beginner range covers casual swimming and water play, and they're simple to care for and won't cost you a fortune.
Regular swimmers. If you're swimming several times a week, regular chlorine exposure wears gear down fast. Our mid-range swimsuits keep their fit and durability through consistent training while maintaining their fit and durability through regular training.
Active and competitive swimmers. Training hard means your suit needs to actually support your performance. Our performance range minimises drag, holds its shape through intensive training, and and stays secure during active swimming sessions.
How to care for your swimsuit
Straight after swimming, wash out chlorine, salt and sunscreen before they settle into the fabric. Air dry flat or hung up, rolling it wet traps moisture and causes smell. Keep it away from direct sun because UV fades colours and weakens the fabric. For deeper cleaning, soak briefly in cool water with mild detergent, rinse well and air dry. Store flat or hung rather than folded. Comes with a 2-year warranty.
Swimsuits by type
Type
Best for
Beginner and casual swimsuits
First-time buyers, general water activities, occasional use.
Regular swimmers, all-round swimming styles, pool and beach.
Everyday swimsuits
Competitive swimming, active practice, serious swimmers.
A swimsuit should feel snug and supportive without restricting movement. Choose materials that bounce back after stretching so they maintain shape through the season. Do some arm circles and squats in the changing room to make sure nothing pinches or gapes.
Is a loose swimsuit suitable for all swimming styles?
Loose fits are perfect for casual swimming and water play where freedom of movement matters most. For active or competitive swimming, a snug fit reduces drag and holds its shape through faster, more intense strokes and training sessions.
What is the best swimsuit for sensitive skin?
How long does a swimsuit last?
What is the best swimsuit for frequent swimmers?
Look for swimsuits made from soft, hypoallergenic materials with smooth seams that won't irritate your skin. Chlorine-resistant fabrics that are gentle on the skin are essential. Avoid rough finishes or scratchy edges, and always rinse immediately after swimming to remove chlorine before it can cause irritation.
With regular care, several seasons depending on training intensity. Competitive swimmers wear them out faster than casual swimmers. Watch for fading, loose elastics, and permanent stretching. Rotating between suits extends lifespan. Comes with a 2-year warranty.
Chlorine-resistant fabrics are essential if you're in the pool constantly. They actually resist the damage from pool chemicals and keep their colour and shape through loads of use. Built for swimmers who rack up serious laps.
Made For Regular Pool Time
A reliable swimsuit means one less thing to worry about. Built for regular pool use, our range doesn't lose its shape or colour quickly. Made for swimmers who train regularly. Shop online or in store. Every pair is backed by a 2-year warranty.
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