Freediving, scuba diving, and surfing—do I need three different thermal suits?
Freediving, scuba diving, and surfing—do I need three different thermal suits?
HA must-read for water sports enthusiasts: Is it really okay to mix and match freediving, scuba diving, and surfing wetsuits?
Choosing winter clothing shouldn't be based solely on thickness. This article provides an in-depth analysis of the "warmth," "flexibility," and "ease of wear" that are of most concern to the average user.

By analyzing the pressure resistance requirements of scuba diving, the soft and comfortable fit of freediving, and the high frequency of surfing, we provide the most practical cross-disciplinary clothing advice and maintenance guidelines to help you spend your money on the right equipment.
Why do these three types of clothes feel so different when they are all 3mm thick?
Many beginners, upon entering a store, see the winter coats hanging there, all seemingly similar in thickness, yet their prices and wearing methods vary drastically. In reality, winter coats, like shoes, come in different types. For example, running shoes, hiking boots, and basketball shoes are all suitable for walking, but you wouldn't want to wear hiking boots to play basketball.
1. Scuba Diving: Your "Portable Thermos"
The worst thing about scuba diving is shivering in the water. Scuba diving involves minimal movement, and the body heat is mainly lost through the cold seawater.
- Details that most people notice: Why does this feel so thick?
- Professional explanation: Scuba suits need to withstand the pressure of deep water; the suits must not be flattened in order to effectively keep warm.
- A common pain point for beginners: easy to put on and take off. That's why scuba suits usually have a long back zipper and come with a long rope so you can pull it by yourself.
- Recommendation: If you are sensitive to the cold, don't skimp on this; be sure to choose one with a brushed lining and a close-fitting cut.
- Freediving: A Tight Feel Like a "Second Skin"
Self-diving is all about holding your breath until the very end. Anything that makes you feel "tight" or "loose" will distract you.
- Details that most people notice: Why is the lining of this kind of clothing sticky? And why is there no zipper?
- Professional explanation: That sticky substance is called "open cell," which can adhere completely to the skin and prevent cold water from getting in.
- Beginner's pain point: It's hard to put on! You have to spray diluted shampoo on it to get in. But once you put it on, the flexibility is unmatched by other clothes.
- Recommendation: If you want to take beautiful photos and move gracefully in the water, the two-piece hooded design of a self-diving suit is your best choice.

- Surfing: Let your shoulders off the ground
The most tiring part of surfing is paddling, so your shoulders need to be flexible.
- Details that most people notice: Why is this piece of clothing so soft under the armpits and around the neck?
- Professional explanation: Because surfing requires constant paddling and lifting your head, if the material isn't soft enough, your armpits will get chafed and red.
- A common problem for beginners: chafing can occur when lying face down on the board, especially around the chest and stomach. That's why surf suits have extra thickness and abrasion-resistant layers in these areas.
- Recommendation: Surf jackets usually have zippers on the chest (or no zippers at all) to make it more comfortable for you to lie on the board.
Real-world comparison: What are the differences between the three types of clothing?
|
Your needs |
Scuba diving model |
Freediving model |
Surf sports model |
|
The speed at which you put it on |
Fastest (Long zipper) |
Slowest (Use lubricant) |
medium (Requires some skill) |
|
Is it cold in the sea? |
Most warm (Thick and pressure resistant) |
Extremely warm (Like a suction cup) |
ordinary (Prioritizes elasticity over warmth) |
|
The feeling of moving hands and feet |
It's quite firm, suitable for slow swimming. |
Very soft and unrestricted |
Super flexible shoulders |
|
Is it durable? |
Easy to wash, can be stored anywhere |
Afraid of being scratched by fingernails |
Very durable and wear-resistant |

Common "Buyer Myths"
Q1: Coach, I heard that it's easier to put on and take off if you buy a size up, is that true?
A1: This is the most common mistake beginners make. If your thermal underwear is "too loose," cold water will keep flowing in, and your body heat will be drawn away. Buying a 3mm one will feel like wearing a 0mm one. You must buy one that is "tight but not constricting." The less water gets in, the warmer you will be.
Q2: Can I buy a surf suit to go diving?
A2: If you're snorkeling in Kenting or Penghu during the summer, you can. But if you're going to go down to a depth of 15 meters with an air tank, your wetsuit will be flattened in deep water and lose its warmth, so you'll probably start shivering halfway down.
Q3: How do I choose clothes that suit my body shape?
A3: Aropec's clothing is designed for Asians. Asians are generally flatter-figured, and when wearing Western brands, there's often a gap around the waist, which acts as a "water reservoir" and makes you feel cold. The advantage of choosing a local brand is that the cut is more fitted, and you truly feel the warmth.

Maintenance is simple: Want your clothes to last longer?
- Avoid sun exposure: The sun is a killer for winter clothing; once the rubber cracks, it's irreversible.
- Soak in water for a while: Salt won't wash off completely, and clothes will become stiff. Soak them in a basin for 30 minutes when you get home.
- Air drying is the most important step: Hang it in a well-ventilated place and put it away only when it is completely dry.
Further Reading: The First Step to Becoming a Professional Underwater Enthusiast: Advanced Buying Guide
title:
- Professional Coach's Secrets: Besides Thickness, 3 Essential Material Terms to Consider When Choosing a Winter Jacket
- Reason: To satisfy advanced readers interested in "material properties" and increase professional depth (EEAT).
Source of information cited:
- PADI (Professional Association of Diving Instructors) Equipment Guidelines: Official teaching standards for thermal protection in cold waters.
- AIDA (International Association for the Development of Freediving) Competition Guidelines: Application of Hydrodynamics and the Thermal Insulation Principles of Open Cell Slip-on Materials.