When Radiator pioneered the original 0.5mm thermal vest, it was hailed as the biggest thing since the legrope. Our premium Slipskin inner lining has zero resistance against your skin and doesn't soak up water. So you're freer to move and can stay out longer.

And when you realise just how much warmer they make you, you'll wonder what you ever did without one.

In cold climates, wear them under your wetsuit for more warmth and less resistance. In warmer climates, wear them as a wetsuit top and enjoy more warmth, more flexibility and more freedom. Radiator helps you stay out longer.