Thickness and Warmth

Winter water in the Netherlands is cold. From November to February, we recommend a minimum of 5/4mm (5mm body, 4mm arms/legs). For very cold water (below 10°C), choose 6/5mm or 7/6mm. The numbers indicate the thickness in millimeters.

Thicker is warmer, but it also restricts your freedom of movement. In 2026, many premium brands will use advanced neoprene material that is warmer with less thickness. This is more expensive but much better.

Cut and Fit

A good winter wetsuit should fit snugly without restricting your movement. This prevents water infiltration. Water between your body and the wetsuit is warmed by your body heat – which is why the fit must be perfect.

Choose a full suit with a hood in winter. A lot of body heat is lost through your head. Separate hoods are also available for extra insulation. For the most extreme conditions, add gloves and booties.

Material Options

Traditional neoprene is good, but limestone neoprene is warmer and more durable. Thermally lined wetsuits have extra insulation on the inside. In 2026, brands are also experimenting with graphene-coated materials that retain heat better.

Make sure your wetsuit is flexible around your armpits and inner legs where you have a lot of movement. Reinforced areas on your shoulders and chest help maintain shape throughout the season.