You’ve got your wetsuit, you’re ready to hit the water—now comes the question: what should you wear underneath? Choosing the right underlayer isn’t just about comfort. It’s also about keeping warm, protecting your skin, and making your time in the water more enjoyable. By understanding what works best and why, you can feel confident and prepared for every dive, surf session, or swim.
The right underlayer depends on water conditions, personal preference, and the type of activity you’re doing. Whether it’s a snug swimsuit, a thermal layer, or a quick-drying rash guard, your choice can make all the difference in how comfortable and warm you feel.
If you’re not sure where to start, don’t worry. In this guide, we’ll cover the most common underlayer options, their benefits, and how to choose the right one for your needs.
What is the purpose of wearing something under a wetsuit?
If a wetsuit is designed to keep you warm and protected, why bother wearing something underneath? The answer comes down to three key factors: comfort, warmth, and hygiene. While a wetsuit does most of the heavy lifting when it comes to insulation, an underlayer can make your experience even better.
Wearing a base layer or liner under a wetsuit helps prevent chafing, adds extra warmth, and makes the suit easier to put on and take off. It also provides a layer of cleanliness, ensuring your wetsuit stays fresher over time.
Why an underlayer matters
- Improved comfort: A smooth, lightweight layer can reduce the irritation that sometimes comes from direct contact with neoprene.
- Enhanced insulation: In cold water, a thermal underlayer helps retain body heat, keeping you warmer for longer.
- Easier maintenance: A base layer absorbs sweat and oils, keeping the inside of your wetsuit cleaner and extending its lifespan.
- Faster transitions: A snug underlayer helps the wetsuit slide on and off more easily, especially when it’s wet.
What material do you wear under a wetsuit?
When it comes to underlayers, not all materials are created equal. Choosing the right fabric ensures that you stay warm, comfortable, and able to move freely. The best materials are lightweight, quick-drying, and capable of wicking moisture away from the skin.
Common materials include Lycra, neoprene, and thermal blends designed for water sports. Each has its own unique benefits, making it easy to find an option that suits your specific needs.
Recommended materials
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Lycra and Spandex:
- Soft, stretchy, and form-fitting.
- Reduces friction, prevents rashes, and allows for full range of motion.
- Perfect for warm water or activities where flexibility is key.
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Neoprene liners:
- Thin neoprene layers provide extra insulation without bulk.
- Ideal for cold water, they help maintain body heat and improve overall comfort.
- Easy to slip on and off thanks to their smooth surface.
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Thermal base layers:
- Designed to wick moisture away while trapping heat.
- Great for colder conditions or extended sessions in the water.
- Often made from fleece-like or specialized thermal fabrics.
By choosing a high-quality material, you’ll improve your experience and get more out of every trip to the water.
What do you wear under a wetsuit?
Ultimately, the best thing to wear under a wetsuit depends on the conditions and your personal preference. Some people prefer minimal layers to keep things simple, while others add thermal gear for extra warmth. It’s about finding what feels right for you.
Swimsuits, rash guards, and base layers are all popular choices for under-wetsuit wear. Each offers its own set of advantages, so you can tailor your selection to the environment and activity.
Common options
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Swimsuits:
- A basic one-piece or bikini is often enough in warm waters.
- Provides a comfortable, non-restrictive layer.
- Easy to wear, quick to dry, and perfect for casual use.
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Rash guards and surf tops:
- Help prevent chafing and add light insulation.
- Great for water sports that require extra mobility.
- Quick-drying and often equipped with UV protection.
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Thermal liners:
- Designed for cold-water conditions, these layers trap heat and keep you warm.
- Can be full-body suits or separate tops and bottoms.
- Offer excellent comfort and temperature regulation.
What types of underlayers are commonly worn beneath wetsuits?
Underlayers come in various styles and levels of insulation. Whether you’re snorkeling in a tropical lagoon or diving into chilly waters, there’s a suitable option to keep you comfortable and protected.
Popular underlayers include swimsuits, neoprene liners, rash guards, and full-body thermal suits. Each type serves a specific purpose, allowing you to customize your setup based on the activity and environment.
Examples of underlayers
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Swimsuits and boardshorts:
- Simple, lightweight, and ideal for warm conditions.
- Great for casual swimming, surfing, or snorkeling.
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Rash guards and surf shorts:
- Provide light protection against chafing and sun exposure.
- Perfect for active sports or long days on the water.
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Neoprene base layers:
- Thin neoprene vests, shorts, or full suits add insulation.
- Best for colder water or prolonged water sports.
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Thermal undergarments:
- Fleece-lined or specially designed thermal layers for cold environments.
- Offer excellent warmth without adding bulk.
With these options, you can find the perfect combination of comfort and functionality for any water adventure.
Is it better to wear a swimsuit, a rash guard, or a full-body base layer?
This depends on the water temperature, activity type, and your personal comfort level. Each option has its strengths, and the best choice is the one that meets your specific needs.
For warm water, a swimsuit or rash guard is often sufficient. In cold water, a thermal layer or neoprene liner provides the extra warmth needed. By considering the conditions, you can pick the option that keeps you comfortable and ready to enjoy the water.
A closer look at the options
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Swimsuit:
- Great for warm weather and recreational use.
- Minimal coverage but enough for warm water activities.
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Rash guard:
- Adds light insulation and sun protection.
- Reduces chafing, making it ideal for surfing or paddleboarding.
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Full-body base layer:
- Maximum insulation for cold water or long dives.
- Provides coverage from neck to ankle, ensuring consistent warmth.
Choosing the right underlayer ensures that you stay comfortable, no matter the conditions.
What do men wear under a wetsuit?
Men’s options for under-wetsuit layers are straightforward and functional. Most men prefer something snug that won’t shift around or cause discomfort while moving.
Common choices include compression shorts, boardshorts, or a thermal top. These layers provide support, reduce chafing, and add a bit of warmth when needed.
Popular options for men
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Boardshorts or swim trunks:
- Simple and effective for warm water.
- Provide a smooth surface under the wetsuit.
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Compression shorts or briefs:
- Offer a snug fit that won’t bunch up.
- Reduce chafing during long sessions.
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Thermal tops or vests:
- Add a layer of warmth for colder conditions.
- Help maintain core temperature in cool water.
What do women wear under a wetsuit?
Women often have more varied options when it comes to under-wetsuit wear. Comfort, coverage, and support are the main considerations. Many women opt for secure swimwear or performance base layers that provide both warmth and flexibility.
Popular choices include one-piece swimsuits, bikinis, or thermal tops and leggings. These options ensure that the wetsuit fits smoothly, prevents chafing, and offers the necessary warmth and comfort.
Common choices for women
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One-piece swimsuits or bikinis:
- Comfortable, easy to wear, and quick-drying.
- Provide a basic barrier between the skin and wetsuit.
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Sports bras and shorts:
- Offer added support and a snug fit.
- Reduce chafing and improve comfort for active sports.
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Thermal leggings and tops:
- Provide extra warmth in cold water.
- Offer full coverage and flexibility.
Conclusion
The right underlayer can make a big difference in how you feel and perform in the water. By choosing a swimsuit, rash guard, or thermal base layer, you can ensure comfort, warmth, and protection. With a bit of thought and preparation, you’ll be ready to enjoy every dive, wave, or swim to the fullest.
At Szoneier, we understand the importance of quality wetsuit gear. Our years of experience manufacturing neoprene products, including custom wetsuits and accessories, ensures that you have reliable, high-performing gear for every water adventure.
