Probably the world's best-selling thermal undergarment is now available in a simple one-piece option. Featuring innovative two-layer technology, the NEW Fourth Element One Piece Arctic Undersuit provides a simple solution to the challenges of thermal protection for drysuit divers.

The Arctic creates a micro-climate around the diver

Constructed with comfort and utility in mind, the minimalist design provides outstanding performance under drysuits. In a layering system, the Arctic One Piece Undersuit is suited for use underneath neoprene, membrane and trilaminate suits.

Arctic’s two layers of high insulation and low bulk fabric ensure exceptional levels of thermal protection. Using a unique combination of fast-wicking and high-insulation fabrics, the Arctic creates a micro-climate around the diver, keeping the body dry and warm.

A high-density inner fleece provides superior insulation, with maximum comfort and wicking, whilst the outer layer, which has a water-repellent finish, ensures a snug fit.

Reduced rate of cooling

The Arctic One Piece Undersuit requires less loft to perform due to more effective management of air held in the suit’s fibres. Instead of maximising the thickness of the layer of air near the skin, the Arctic minimises the movement of air within, reducing the cooling rate without any risk of trapping the air and preventing its release from the dump valve.

Field testing

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.

Fourth Element Arctic One Piece Undersuit features

• Fast-wicking and high-insulation
• Performs whilst wet

• High-density inner fleece

• Water-repellent outer layer
• Updated fit for flexibility in movement and donning
• Full zip for easier donning
• Lower neckline for maximum comfort
• Close-fitting, but allows for other layers
• Thumb loops and foot stirrups to aid donning
• Single layered lower legs reducing bulk around the ankles
• Hand Warmer Pockets
• Pee-valve ready
• Outer: 80% Recycled polyester, 17% nylon, 3% elastane.
• Inner: 100% recycled polyester

Care Instructions

• Machine Wash Separately at 30°
• Line dry
• Do not use bleach
• Do not tumble dry
• Do not iron
• Do not use fabric softeners