Best Competitive Swimwear Girls One-Piece Suits of 2025

* We independently evaluate all recommended products and services. If you click on links we provide, we may receive compensation.
For young competitive swimmers, having the right swimsuit can make all the difference. Girls one-piece suits are a popular choice for their streamlined design and comfortable fit. These swimsuits are made with high-quality materials that offer excellent durability and resistance to chlorine. They come in a variety of colours and styles to suit different preferences and body types. Designed to reduce drag and maximise speed, these competitive swimwear suits are a great choice for any young swimmer looking to perform their best in the pool.
At a Glance: Our Top Picks
Top 10 Competitive Swimwear Girls One-Piece Suits
Speedo Junior Girl's ECO Endurance+ Swimsuit
The Speedo ECO Endurance+ Swimsuit is designed with a Medalist cut that enhances your shoulder movement and flexibility, making it perfect for training sessions. Crafted from ECO Endurance+ fabric, it offers excellent durability while providing the comfort you expect. You will appreciate the fit that young swimmers adore, now made from 50% recycled materials to help reduce environmental impact. Additionally, the suit is 100% chlorine-resistant, ensuring it dries quickly and stands up to regular use in the pool.
Speedo Junior Girl's Hyperboom Legsuit for Comfort
The Speedo Hyperboom Legsuit is designed for young swimmers who want comfort and freedom of movement during longer swim sessions. Its muscleback design allows for a full range of motion, so you can swim without restrictions. The legsuit provides increased coverage, offering both style and support. With higher chlorine resistance than standard fabrics, it ensures that your swimwear remains looking like new for longer. Additionally, the shape retention feature allows the fabric to stretch, giving you a comfortable fit throughout your swim.
Speedo Junior Girl's Endurance+ Legsuit Swimsuit
The Speedo Endurance+ Legsuit offers excellent features for young swimmers. Its medalist design enhances shoulder movement and flexibility, making it perfect for training sessions. The legsuit provides added coverage, ensuring you feel comfortable while swimming. Additionally, the swimsuit boasts 100% chlorine resistance, ensuring it stands up to regular use and maintains its performance over time. Moreover, its quick-dry fabric means you won't be left waiting long after your swim workout, allowing for a more convenient experience.
Speedo Girl's Hyperboom Medalist Swimsuit, Cobalt Pop
The Speedo Hyperboom Swimsuit is an excellent choice for young swimmers. Its quick-drying fabric ensures you stay comfortable both in and out of the water, making it perfect for training sessions or casual swims. The swimsuit is designed with fitness in mind, providing a snug fit that enhances your performance. Plus, its chlorine-resistant material ensures durability, allowing you to enjoy countless swims without worrying about wear and tear. With its vibrant Cobalt Pop design, you'll also look stylish while you swim.
Arena Girls Powerskin St Next Eco Swimsuit
The Arena Powerskin St Next is an innovative racing suit designed specifically for girls, made with recycled fabrics. This eco-friendly suit is not only lighter but also reduces water absorption, helping you swim faster. The unique fabric offers long-lasting compression, enhancing durability throughout your training. With its ergonomic construction and low profile seams, you can enjoy a perfect fit and complete freedom of movement, while the reinforced shoulder straps provide added comfort and support during your performance.
Arena Solid Challenge Team Girls' Swimsuit
The Arena Solid Challenge Swimsuit is designed for young swimmers who require a reliable and comfortable option for training. Made with MaxLife fabric, it dries quickly and resists chlorine, ensuring longevity even with regular use. With UPF 50+ UV protection, you can feel secure knowing your skin is shielded while swimming outdoors. The one-piece design features an open back and thin straps, providing freedom of movement and reducing friction, allowing you to swim with ease and confidence.
Speedo Junior HyperBoom Muscleback Swimsuit
The Speedo HyperBoom Swimsuit is designed for young swimmers aged 5-6 years. Its muscleback design provides a full range of motion, making it ideal for longer swim sessions. With enhanced chlorine resistance, this swimsuit maintains its fit longer, allowing you to enjoy your time in the pool without worry. The shape retention feature ensures that the fabric stretches comfortably, giving you the freedom to swim without feeling restricted. This swimsuit truly combines comfort and durability for the ultimate swimming experience.
Arena Girl's Racing Suit with Recycled Fabrics
The Arena Racing Suit is the first of its kind for girls, crafted from recycled fabrics. This innovative design makes it significantly lighter, ensuring you experience less water absorption and drag while swimming. The suit’s ergonomic construction features low profile seams, offering you a perfect fit and freedom of movement. With reinforced shoulder straps, it guarantees outstanding comfort and durability, allowing you to perform at your best without any distractions.
Arena Girls Powerskin St Next Ob Jr Swimsuit
The Arena Powerskin One Piece is an innovative racing suit designed specifically for girls. Made from over 60% recycled fabrics, it not only supports sustainability but also offers a lighter feel, reducing water absorption and drag. This means you can swim faster and with greater ease. Its ergonomic design, along with low profile seams, provides an excellent fit and freedom of movement, allowing you to perform at your best. Additionally, reinforced shoulder straps ensure comfort and durability, making it perfect for competitive swimmers.
Speedo Kids Navy/Purple One Piece Swimsuit
The Speedo One Piece Swimsuit is designed for young swimmers, offering a Thinstrap Muscleback for total flexibility while in the water. The higher chlorine resistance ensures the swimsuit maintains its quality over time, allowing you to enjoy a fresh fit for longer. With CREORA HighClo Shape Retention, the fabric stretches comfortably, giving you the freedom to swim without feeling restricted. Additionally, the gusset lining adds an extra layer of comfort during wear, making it an excellent choice for competitive swimming.
Frequently Asked Questions (FAQs)
1. What are competitive swim suits called?
The style of men's competition swimsuits is called a jammer. With the extreme focus placed on compression technology, you can easily see why. As suit rules have ebbed and flowed over the years, current international specifications dictate a suit for men that can run only from the belly button to the top of the knees.
2. What is a women's one-piece bathing suit called?
The maillot (UK: /mʌɪˈəʊ/; US: /maɪˈoʊ, maɪˈjoʊ/) is the fashion designer's name for a woman's one-piece swimsuit, also called a tank suit. A maillot swimsuit generally consists of a tank-style torso top with high-cut legs.
3. What was the one-piece swimming suit once called?
Kellerman marketed a line of bathing suits and her style of one-piece suits came to be known as "the Annette Kellerman". The one-piece swimming tights became accepted swimsuit attire for women in parts of Europe by 1910. Harper's Bazaar praised the Kellerman swimsuit, writing in June 1920 (vol.
4. Are one piece swimsuits flattering?
Not only are one-piece swimsuits extremely flattering on practically every body type, but they also look super glamorous in poolside selfies.
During our competitive swimwear girls one-piece suit research, we found 306 competitive swimwear girls one-piece suit products and shortlisted 10 quality products. We collected and analyzed 21,429 customer reviews through our big data system to write the competitive swimwear girls one-piece suits list. We found that most customers choose competitive swimwear girls one-piece suits with an average price of £17.41.
The competitive swimwear girls one-piece suits are available for purchase. We have researched hundreds of brands and picked the top brands of competitive swimwear girls one-piece suits, including Speedo, Arena.

Keira Murphy is an outdoorsy girl who loves sports and the outdoors. She's from the UK, but now lives in New York. Keira also has a YouTube channel where she uploads videos of her playing different sports, exploring new places or doing outdoor activities with friends. She started her channel because she wanted to share her love for sports and the outdoors with others who may not be able to get out as much as they would like due to injury, disability or other reasons. Her favorite sport is basketball!