What to look for when choosing a training swimsuit? 5 key buying tips

Want to seriously train in the water but don't know how to pick a swimsuit? You might have tried wearing a beautiful resort bikini to the pool, only for it to start shifting, digging in, or even loosening after two hours of swimming. In fact, training swimsuits are very different from regular swimwear. Both the fabric, cut, and durability need to be designed for prolonged immersion in water and high-frequency movements. Today, we'll break down 5 key buying tips to help you find the perfect training swimsuit.

Why are training swimsuits different from regular swimsuits?

Resort swimwear focuses on appearance, colors, and style variations, usually worn for only an hour or two for photos. However, training swimsuits need to withstand multiple weekly training sessions, prolonged immersion in chlorinated pool water, and continuous repetitive movements like strokes, turns, and kicks. Therefore, their design goals are completely different: training swimsuits must be durable, snug, stay in place, and resist chlorine erosion. If you are serious about improving your swimming technique or visit the pool multiple times a week, choosing the right training swimsuit is the first step.

5-Point Checklist for Choosing a Training Swimsuit

1. Chlorine Resistance of Fabric: How to choose so it doesn't wear out quickly?

Chlorinated pool water is the biggest enemy of swimsuits. Ordinary nylon or spandex can easily turn yellow, loosen, or even unravel due to chlorine. Chlorine resistance of fabric is the primary consideration when choosing a training swimsuit. We recommend opting for polyester or professional four-way stretch fabrics. These materials are inherently more chlorine-resistant, and their elasticity recovery is strong, so they won't easily deform after multiple uses.

For example, the NAMI Wonda Swim athletic swimwear series uses the highest quality four-way stretch fabric, combined with special "Hussar stitching", designed to meet training demands and is expected to remain a high-quality choice until 2026. If you want to see the actual products, you can browse more styles on the NAMI athletic swimwear category page.

2. Secure Fit / Non-Shift Design: No need to constantly adjust your swimsuit mid-swim

Nothing is more annoying than a shoulder strap falling down or a panty shifting mid-swim. Secure fit and non-shift design are core aspects of training swimsuits. Look for wide and stable strap designs, sufficient bust support (especially for women with medium to large busts), and leg openings that are snug but don't dig into the inner thigh.

Special stitching (such as Hussar stitching) can significantly enhance the durability and secure fit of swimwear, reducing the chance of seams breaking or loosening due to pulling. When choosing a swimsuit, pay attention to the stitching locations and quality; these details will directly affect your training experience.

3. Competition vs. Training Swimsuits: Which one do you need?

Many people confuse competition swimsuits with training swimsuits. Racing swimsuits typically use compression fabrics and a tight cut, aiming to reduce drag and increase speed, but they are less comfortable and not suitable for prolonged wear. Training swimsuits, on the other hand, prioritize comfort, durability, and breathability, allowing you to easily handle one or two hours of daily practice.

For most swimmers, a training swimsuit is the everyday choice. Unless you are an athlete preparing for a competition, there's no need to specifically buy a racing style. Instead, you should invest in a durable and comfortable training swimsuit.

4. Suitable for Long Immersion: Breathability and quick-drying are also important

Swimming practice usually involves long periods of immersion, so the fabric's drainage speed and quick-drying properties are very important. If the swimsuit stays wet and non-breathable for a long time, it can easily lead to skin irritation or bacterial growth. When choosing a swimsuit, pay attention to the quick-drying features of the fabric. After training and rinsing, it should be able to dry quickly.

Additionally, the inner layer of the swimsuit should have good breathability to reduce stuffiness, especially in summer or heated indoor pools, as this will affect your overall comfort.

5. Cut and Body Shape: How to choose for different body types?

Everyone has a different body shape, so the suitable swimsuit cut varies. For example, if you are a 158cm slightly curvy woman, you might consider a high-waisted one-piece cut, which has a waist-slimming effect without digging into your stomach. If you have a pear-shaped figure (fuller lower body), you can choose dark bottoms with contrasting or bright tops to balance your visual proportions.

Women with smaller busts can choose styles with padding or ruffles to add volume; women with larger busts should pay attention to bust support, avoiding wireless styles that lack sufficient elasticity. Remember, a training swimsuit isn't just about functionality; it can also showcase your personal style. If you want to see more styles suitable for different body types, you can browse the NAMI athletic swimwear series.

Practical Buying Advice: Where to find the right training swimsuit for you?

There are many training swimsuit options on the market, but not all are durable and snug enough. We recommend looking for brands that specialize in athletic swimwear, as they will better understand training needs. The NAMI Wonda Swim athletic swimwear series is designed specifically for training, using the highest quality four-way stretch fabric and special Hussar stitching. In 2026, it continues to offer high-quality options, suitable for both beginners and experienced swimmers.

Maintenance Tips: How to make your training swimsuit last longer?

Even if you choose a high-quality swimsuit, it will wear out quickly if not properly maintained. Here are some basic maintenance tips:

• Rinse immediately with clean water after training to remove residual chlorine.
• Do not use hot water or a washing machine, as this will damage the elastic fibers.
• Do not wring dry; gently pat away excess water with a towel.
• Air dry, avoiding direct sunlight which can cause color fading or fabric aging.
• Have two to alternate between, allowing the swimsuit time to fully dry and extending its lifespan.

Conclusion: Find your training rhythm

Swimming practice is not just about technical training; it's also a process of finding your rhythm and enjoying freedom in the water. Choosing the right training swimsuit allows you to focus more on each stroke and every breath, without being distracted by adjusting your swimsuit or worrying about it shifting. As NAMI has always believed: everyone has their own ocean, breaking free from conventions and labels, expressing the values you believe in with the most comfortable and confident approach.

Ready to find the perfect training swimsuit for you? Head over to the NAMI main swimsuit collection and start your training journey now!

Frequently Asked Questions (FAQ)

What is the difference between a training swimsuit and a competition swimsuit?

Competition swimsuits focus on compression and drag reduction, with a tight cut suitable for short-duration racing; training swimsuits prioritize comfort, durability, and chlorine resistance, suitable for long-term daily practice. Most people training for swimming should choose a training swimsuit.

How do I know if the swimsuit fabric is chlorine resistant enough?

Check the product label or description. Choose polyester or professional four-way stretch fabrics. These materials are inherently more chlorine-resistant and less likely to turn yellow or loosen due to pool water.

How often should a training swimsuit be replaced?

Depending on usage frequency and maintenance, if you train 3–4 times a week, you'll generally need to replace it after about six months to a year. If you notice the swimsuit starting to loosen, deform, or fade, it's time for a new one.

What style of training swimsuit should a slightly curvy body type choose?

Consider a high-waisted one-piece cut, which offers a slimming effect while being comfortable; or choose dark-colored styles with slimming lines, which will make you appear slimmer. Most importantly, it should be comfortable and make you feel confident.

How should I care for my swimsuit after training to make it last longer?

Immediately rinse with clean water after training to remove chlorine. Do not use hot water or a washing machine, do not wring dry, and air dry in the shade, avoiding direct sunlight. It's best to have two to alternate, allowing the swimsuit time to fully dry.