These super warm 5mm wetsuits are for you if you 're planning on heading out in properly cold water temperatures. There is no shortage of those around the British Isles and northern Europe. These waterproof technological masterpieces are the result of the great surf revolution and the invention of neoprene stitched suits. They 've allowed water sports enthusiasts to go deeper, longer and larger as they are able to keep their body temperatures warmer longer. Protected from the icy water seeping in for more efficient insulation, their robust construction provides ample protection. Their thickness is perfect for winter and the cooler autumn months.