Probably the world's best selling thermal undergarment is now available in a simple one piece option.

Featuring the innovative two layer technology pioneered by fourth element, the One Piece Arctic provides a simple solution to the challenges of thermal protection.

(Ice)Field Tested by Divers

Backed by years of field testing by the Norwegian Navy, the British Antarctic Survey Dive Team, the French Marines and the Danish Navy, the Arctic was designed using high technology fabrics and has been tested in real diving conditions from the Arctic to the Antarctic.
 

Total Versatility

Use the Arctic on its own in moderate waters, and in a layering system with Xerotherm in cold waters. This is the most versatile undergarment on the market.