Views: 0 Author: Site Editor Publish Time: 2025-10-10 Origin: Site
STEP 1: DETERMINE THE CORE THICKNESS BASED ON WATER TEMPERATURE
Use the water temperature as your starting point. Here is a general guideline:
| Water Temperature | Recommended Thickness | Common Wetsuit Type |
| 75°F+ (24°C+) | 0.5 mm - 2 mm | Shorty or Top |
| 65°F - 75°F (18°C - 24°C) | 2 mm - 3/2 mm | Springsuit or Fullsuit |
| 58°F - 68°F (14°C - 20°C) | 3/2 mm | Fullsuit |
| 52°F - 58°F (11°C - 14°C) | 4/3 mm | Fullsuit |
| 45°F - 52°F (7°C - 11°C) | 5/4 mm or 5/3 mm | Fullsuit |
| Below 45°F (7°C) | 6/5 mm+ | Fullsuit (often with integrated hood, boots, gloves) |
Note on the "mm" notation (e.g., 3/2 mm): This indicates differential thickness. The first number is the thickness on the torso and core (where you lose the most heat), and the second number is the thickness on the arms and legs (where you need more flexibility).
STEP 2: APPLY "ZONING" OR DIFFERENTIAL THICKNESS
A wetsuit with a single uniform thickness is inefficient. A smart design places thicker material where it's needed most and thinner material where flexibility is crucial.
Thicker Panels (for Warmth):
Torso / Chest / Back: The core body, where your vital organs are located. Keeping this area warm is the top priority.
Upper Thighs / Kidneys: Areas prone to heat loss.
Thinner Panels (for Flexibility):
Shoulders / Underarms: Critical for arm movement in swimming, paddling, and surfing. Thinner material here reduces fatigue.
Back of Knees / Inside Elbows: Allows for a full range of motion without constriction.
Example of a Zoned Design: A 4/3 mm suit has 4 mm neoprene on the torso and 3 mm on the arms and legs. A high-end suit might even have 5 mm on the lower back and 2 mm under the arms.
STEP 3: REFINE BASED ON ACTIVITY AND PHYSIOLOGY
High-Activity (Swimming, Triathlon): Prioritize flexibility. A triathlete in 65°F (18°C) water might choose a sleeveless 2mm or a very flexible 3/2 mm suit to allow for a freestyle stroke, whereas a surfer might prefer a 4/3 mm for the extra warmth during periods of inactivity.
Low-Activity (Scuba Diving, Snorkeling): Prioritize warmth. A scuba diver, who moves less and cannot easily surface, will choose a thicker suit, perhaps a 5 mm or even 7 mm for colder water.
Cold-Natured Individuals: If you know you get cold easily, consider a suit that is one step thicker than the temperature chart suggests.