Why Your Wetsuit Choice Matters
A good wetsuit keeps you warm, extends your sessions, and protects you from rashes, UV exposure, and minor reef scrapes. A bad one — or simply the wrong one for the conditions — will leave you cold, restricted, and miserable in the water. With so many options on the market, here's exactly what to look for.
Understanding Wetsuit Thickness Ratings
Wetsuit thickness is measured in millimeters and usually expressed as two numbers, like 3/2 or 4/3. The first number is the thickness across the core (chest and back), the second is the thickness on the limbs. Thicker core = more warmth; thinner limbs = more flexibility.
| Thickness | Water Temperature | Best For |
|---|---|---|
| 0.5mm – 2mm | 22°C+ (72°F+) | Tropical, warm water. Sun & rash protection only. |
| 2/2mm | 18–22°C (64–72°F) | Warm summer surf, Mediterranean, California summer. |
| 3/2mm | 14–18°C (57–64°F) | The most popular all-around wetsuit thickness. |
| 4/3mm | 10–14°C (50–57°F) | Cold water, late autumn, early spring sessions. |
| 5/4mm+ | Below 10°C (50°F) | Cold-water surfing; pair with hood, gloves, boots. |
Seam Construction
How a wetsuit is stitched together dramatically affects its warmth and durability.
- Flatlock seams: Stitched flat, visible on both sides. Flexible and durable but not fully waterproof. Fine for warmer water.
- Glued and blindstitched (GBS): Panels are glued together and stitched from one side only — the needle doesn't penetrate fully. Much warmer and more water-resistant.
- Sealed seams (taped or welded): A liquid or tape seal is applied internally over GBS seams. Used in premium cold-water suits. Maximum waterproofing.
Entry Systems: Zip vs. Zip-Free
Back Zip
The traditional long zipper running down the back. Easy to get into and out of, durable, and widely available. The zip can allow a small amount of water flushing, which some surfers find cold.
Chest Zip
A shorter zip panel across the chest. Offers a warmer, more flexible experience across the back and shoulders. Slightly trickier to put on, but preferred by many serious surfers.
Zip-Free
Uses a stretchy neck entry with no zipper at all. Maximum flexibility and zero water flushing. Takes practice to get on and off, and the neck seal must fit well to be effective.
Getting the Right Fit
A wetsuit should fit snugly — like a second skin — without restricting breathing or arm movement. Common fitting mistakes include:
- Too much material bunching at the knees, elbows, or crotch (suit is too big).
- Restricted shoulder movement or difficulty taking a deep breath (suit is too small).
- Gaps at the neck or wrists that allow excessive water flushing.
Try a suit on in the shop if possible. Raise your arms overhead, mimic a paddle motion, and squat down. If any of these feel severely restricted, try a different size or brand — each manufacturer cuts suits slightly differently.
Neoprene Quality: What to Look For
Not all neoprene is equal. Premium suits use limestone-based neoprene (like Yamamoto), which is lighter, more flexible, and warmer than petroleum-based alternatives. If warmth-to-weight ratio matters to you, it's worth investing in a higher-quality suit that will also outlast cheaper alternatives.
Care Tips to Extend Your Wetsuit's Life
- Rinse thoroughly with fresh water after every session.
- Dry inside-out in the shade — direct sunlight degrades neoprene.
- Never use a wire hanger; use a wide, padded wetsuit hanger to preserve the shoulders.
- Avoid folding — hang or roll loosely for storage.
- Use a wetsuit-specific cleaner occasionally to eliminate odors and bacteria.