Nike Swim men's training trunks give you a comfortable and smooth swimming experience! Made of durable and quick-drying recycled polyester fiber material, it provides excellent elasticity and fit, reducing resistance in the water and improving swimming efficiency. Classic and simple design with Nike Swoosh logo to show your sports style. These swimming trunks are suitable not only for professional swimming training, but also for everyday water activities such as surfing, water polo or beach holidays. The waist is designed with elastic bands to provide solid support, allowing you to enjoy the fun in the water. Whether you're training for long distances or enjoying a relaxing dip, Nike Swim Briefs are the ideal choice. Hand washing is recommended to extend product life.
The elastic waistband design ensures a secure fit, and different sizes are available to suit various body types. The chlorine-resistant material ensures it retains its color and elasticity even after long-term use, making it a practical choice for swimming enthusiasts.
- Fabric: Chlorine Resistant Elastic Fiber
- Waistband: elastic design
- Fabric composition: 80% nylon / 20% spandex
*Due to hygiene reasons, this product cannot be returned or exchanged. If you are not sure about the size, it is recommended to check it at the physical store.
The "recommended height" indicated on this website is for general reference only. Due to individual differences in body shape, growth rate, and personal preferences, the actual fit should be determined through trying on or by considering multiple measurements such as bust, waist, and shoulder width before making a final size selection.
Size Chart

| Size | Waist (cm) | Hip (cm) |
|---|---|---|
| 26 | 68.5 – 73.5 | 84 – 89 |
| 28 | 73.5 – 78.5 | 89 – 94 |
| 30 | 78.5 – 84 | 94 – 99 |
| 32 | 84 – 89 | 99 – 104 |
| 34 | 89 – 94 | 104 – 109 |
| 36 | 94 – 99 | 109 – 114.5 |
| 38 | 99 – 104 | 114.5 – 119.5 |
| 40 | 104 – 109 | 119.5 – 124.5 |
Men's Square Leg / Trunks Buying Guide
Q: What is the difference between Trunks/Square Legs, briefs and knee-length swimming trunks?
A: SWIM BOXER, The length of the trouser leg is about the top of the thigh (5-10cm), between swimming briefs and knee-length swimming trunks. It is slim-fitting but has more comprehensive coverage. It is a style that balances professional training with daily swimming. Briefs have the least resistance but are highly exposed; jammers cover above the knees and are mostly used in competitions. The flat-footed version is most popular among Asian swimmers, offering both comfort and professionalism.
Q: What occasions are square swimming trunks suitable for?
A: Boxer swim trunks are the first choice for multiple uses: perfect for daily pool training, swimming lessons, fitness swimming, hotel pools, and indoor competitions. Compared with the triangle version, it will not be overly exposed, and it is more convenient to put on and take off than the knee-length version. For swimmers who have just switched from casual board shorts to professional training, flat-foot styles are the best transitional choice.
Q: How should I choose the material of my flat swimming trunks?
A. For daily training, it is recommended to choose PBT polyester fiber material, and has a service life of up to 1-2 years. If you are pursuing the ultimate fit and low resistance, you can choose Lycra/nylon blend, but its chlorine resistance is weak, so it is recommended to be used only for competitions or short-term use. Be sure to rinse away chlorine and sweat salts with clean water after each swim.







































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