what to wear under a wetsuit

3 min read 13-09-2025
what to wear under a wetsuit


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what to wear under a wetsuit

Choosing the right undergarments for your wetsuit can significantly impact your comfort, warmth, and overall diving or watersports experience. Whether you're a seasoned pro or a newbie, understanding what to wear under a wetsuit is crucial for maximizing performance and enjoyment. This guide will explore the various options available and help you make the best choice for your needs.

What is the Purpose of Wearing Something Under a Wetsuit?

The primary purpose of wearing something under a wetsuit is to create a layer of insulation between your skin and the neoprene. Wetsuits work by trapping a thin layer of water against your skin, which then warms up to your body temperature. However, this only works effectively if the water layer isn't constantly being flushed out by cold water. An undersuit helps minimize this flushing effect, trapping more warm water and enhancing insulation.

What are the Different Types of Wetsuit Undersuits?

Several types of clothing are suitable for wearing under a wetsuit, each offering unique benefits:

Rash Guards:

  • Description: These are lightweight, stretchy shirts and shorts or leggings made from synthetic materials like lycra or polyester.
  • Pros: They protect your skin from chafing caused by the wetsuit's seams, provide a degree of sun protection, and wick away moisture.
  • Cons: Offer minimal insulation against the cold. Best suited for warmer waters or when already using a thick wetsuit.

Neoprene Undersuits:

  • Description: These are made from thin neoprene, similar to the material used in wetsuits themselves. They are often available in shorty, long-john, or full-body styles.
  • Pros: Provide excellent insulation, preventing excessive heat loss.
  • Cons: Can be bulky and feel restrictive to some individuals. May increase the difficulty of getting into your wetsuit.

Thermal Underwear:

  • Description: This category includes various types, like merino wool, silk, or synthetic base layers. These are typically designed for cold weather activities.
  • Pros: Merino wool is excellent for warmth and odor control. Synthetic materials like polyester often offer superior moisture-wicking properties.
  • Cons: May absorb water and become heavy, diminishing their insulation properties. Some fabrics can feel bulky under a wetsuit.

Other Materials:

  • Some people wear swimwear under their wetsuit. This is generally only suitable for warm water conditions. You might consider this if you only need protection from the sun and wetsuit seams.

How Thick Should My Undersuit Be?

The thickness of your undersuit depends greatly on water temperature and your personal tolerance to the cold. Generally, thinner undersuits are sufficient for warmer waters, while thicker ones are necessary for colder conditions. Experiment to find the best balance for your individual needs. Consider the thickness of your wetsuit itself. A thicker wetsuit might only need a thin undersuit for warmth.

Should I Wear a Wetsuit Undersuit in Warm Water?

While not strictly necessary in warm water, a thin rash guard can offer several benefits. It protects your skin from chafing, provides a small degree of sun protection, and helps to improve the comfort level of wearing a wetsuit.

What is the Best Material for a Wetsuit Undersuit?

The ideal material depends on your priorities. For warmth, neoprene undersuits or merino wool base layers are excellent choices. For moisture-wicking and comfort, synthetic materials are usually preferable. Rash guards offer a good balance between protection and comfort.

What Should I Avoid Wearing Under My Wetsuit?

Avoid wearing cotton or materials that absorb a large amount of water. Cotton will become heavy, cold, and lose its insulating properties once wet, leading to hypothermia.

By carefully considering these factors and selecting the appropriate undergarments, you can ensure a comfortable, warm, and enjoyable experience with your wetsuit, whether you are surfing, diving, or participating in other watersports. Remember to prioritize safety and always check the water temperature before entering the water.