Nike Swim men's swim trunks are made of chlorine-resistant polyester fabric, providing lasting elasticity and comfort, allowing you to maintain peak performance even during long periods of pool training. The close-fitting design effectively reduces water resistance, helping you maintain your best performance in the water.
The built-in drawstring waistband ensures a secure and comfortable fit, and is easily adjustable to accommodate different waist sizes. Multiple sizes are available to suit swimmers and professional athletes of all body types.
- Fabric: Chlorine-resistant polyester fiber
- Waistband: Built-in drawstring
- Suitable for: Training, Competition
*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.



























嘉樂 –
著落好舒服,唔會太緊,游水嗰陣好靈活。
俊傑 –
布料質感好厚實,感覺好耐用。
強 –
條褲好襟著,洗咗幾次都無鬆無變色。
Michael Yuen –
Looks great and fits perfectly.
明 –
Cutting好好,好貼身,減少水阻。
偉成 –
顏色幾正,下水後都好亮眼。
志宏 –
腰帶抽繩好穩陣,唔使驚游下游下會鬆。
敏 –
對得住個價錢,下次會再買其他色。
Peter Lee –
Tough fabric that withstands chlorine well.