▚ DECISION PAGE ▚
5mm vs 7mm Wetsuit
The temperate-water millimetre call.
Between roughly 10 and 24 °C the 5-vs-7 decision is about your cold tolerance, dive length, and how much lead and shoulder mobility you will trade for warmth. A 7 mm buys real thermal margin and costs you flexibility plus a couple kilos of ballast; a 5 mm keeps you mobile and honest about your limits.
▚ 5 MM
Henderson Thermoprene 3mm wetsuit
$199.99
▚ 7 MM
Henderson Thermoprene Pro 7mm wetsuit
$491.99
▚ DISCLOSURESome links on this page are affiliate links. As an Amazon Associate we may earn a commission when you buy through them — at no extra cost to you. It never changes the price you pay, and it never changes a verdict.
Head to head
| Axis | 5 mm | 7 mm |
|---|---|---|
| Comfort band (typical) | 18–24 °C | 10–17 °C |
| Added ballast need | Moderate | Noticeably more lead |
| Mobility | Good | Stiffer shoulders |
| Repetitive-dive warmth | Fades on dive two | Holds through the day |
▚ TRAINING NOTEDive within your training and certification. This is gear research, not dive instruction, and not a substitute for training from a certified instructor. Service intervals and no-fly figures cited on this site are illustrative — follow your manufacturer’s manual and your agency’s / DAN’s guidance.
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