Fourth Element

Fourth Element Arctic X Jacket

The Fourth Element Arctic X Jacket is an advanced drysuit thermal undersuit designed for divers who demand exceptional warmth, mobility and all-day comfort in cold-water environments. Combining recycled technical fabrics, a soft high-performance fleece lining and a durable water-repellent outer shell, it delivers outstanding insulation without unnecessary bulk beneath modern drysuits.

Perfect for recreational, technical and CCR diving throughout Melbourne, Victoria and other cold-water environments across Australia, the Arctic X Jacket provides dependable thermal protection while maintaining unrestricted movement for long shore dives, boat dives and extended decompression dives. Pair it with the Arctic X Leggings to build a complete premium drysuit layering system.

Exceptional Warmth Made from Recycled Materials Designed for Divers
Fourth Element Arctic X Jacket

Choose Your Size

RRP
AUD $437
Our Price
AUD $395
You Save
AUD $42 (10%)
Most sizes are available to order. If your selected size is temporarily unavailable from Fourth Element, we'll confirm the latest delivery estimate before processing your order. Australia-wide shipping available.
← Back to Drysuit Undergarments Explore thermal layers for Melbourne and Victorian cold-water diving.
Product Highlights

Next-Generation Premium Drysuit Insulation

The Arctic X Jacket represents the latest evolution of Fourth Element's renowned Arctic thermal range. Designed to provide exceptional warmth while reducing bulk, it delivers excellent insulation without restricting movement inside a drysuit.

A soft fleece interior traps warm air close to the body, while the durable water-repellent outer shell helps maintain comfort during surface intervals. Stretch fabric, articulated sleeves and thumb loops improve fit and make donning a drysuit easier, creating a versatile thermal layer suitable for recreational, technical and professional diving.

Key Features

Key Features

Exceptional Warmth

High-performance insulation delivers excellent thermal protection while maintaining a lightweight, low-bulk profile for drysuit diving.

Recycled Technical Fabrics

Constructed using recycled materials with a soft fleece lining and durable outer shell for comfort, performance and sustainability.

Built for Mobility

Stretch fabric, articulated sleeves and an ergonomic cut provide unrestricted movement both underwater and during surface intervals.

Practical Diver Features

Full-length front zip, thumb loops, storage pockets, reflective details and a water-repellent outer layer make the Arctic X equally practical above and below the water.

Technical Details

Technical Specifications

The Fourth Element Arctic X Jacket is a premium drysuit undersuit engineered for exceptional warmth, comfort and mobility in cold-water diving. Built with recycled technical fabrics, a soft fleece lining and a durable water-repellent outer shell, it delivers high thermal performance with reduced bulk, making it suitable for recreational, technical and professional divers alike.

Product
Fourth Element Arctic X Jacket
Layer Type
Premium drysuit undersuit
Best Use
Cold-water drysuit diving and thermal layering systems
Outer Fabric
85% Nylon / 15% Elastane with durable water-repellent (DWR) finish
Inner Fabric
95% Polyester / 5% Elastane soft fleece lining
Fit
Stretch fit with articulated sleeves for unrestricted movement
Key Features
Full-length front zip, thumb loops, storage pockets and reflective detailing
Performance
Exceptional warmth with minimal bulk, optimised for horizontal trim
Care
Machine wash cool. Line dry. Do not tumble dry, iron or dry clean.
Available Sizes
Men's and Women's standard sizes
Included

What's Included

  • Fourth Element Arctic X Jacket
Size Guide

Need Help Choosing Your Size?

Use the size guide below as a reference before ordering. If you are between sizes or plan to wear additional base layers, contact us and we can help recommend the most suitable fit.

Men’s Size Guide

Fourth Element Arctic X Jacket men’s size guide

Women’s Size Guide

Fourth Element Arctic X Jacket women’s size guide

Why Choose the Fourth Element Arctic X Jacket?

The Fourth Element Arctic X Jacket is designed for divers who need premium thermal performance without the bulk of an expedition undersuit. Built using recycled technical fabrics, advanced insulation and a durable water-repellent outer layer, it delivers dependable warmth while maintaining the flexibility needed for recreational, technical and CCR diving.

Its ergonomic design allows unrestricted movement beneath modern trilaminate and membrane drysuits, making it an excellent choice for divers spending extended periods in cold water without sacrificing comfort or trim.

Built for Melbourne and Australian Cold-Water Diving

Diving throughout Melbourne, Port Phillip Bay, Victoria and Tasmania demands a thermal system capable of adapting to changing water temperatures. The Arctic X Jacket provides reliable upper-body insulation for shore dives, boat dives, instructor work and technical diving while maintaining excellent breathability and freedom of movement.

Complete Your Fourth Element Layering System

The Arctic X Jacket is designed to work as part of a complete layering system. Pair it with the Arctic X Leggings for full-body insulation, or wear it over the Fourth Element J2 or Xerotherm baselayers to build a modular thermal system suited to different water temperatures and dive durations.

Arctic X vs HALO A°R: Which Thermal Undersuit Is Right for You?

The Arctic X is ideal for divers seeking an advanced thermal undersuit that balances warmth, flexibility and low bulk for year-round cold-water diving. Divers regularly undertaking expedition, cave or very long technical dives in extreme cold may prefer the additional insulation offered by the HALO A°R. Choosing the right system depends on your drysuit, local water temperatures and diving style.

Why Buy from Extreme Watersport?

Extreme Watersport is an authorised Fourth Element dealer in Australia, supplying genuine Fourth Element thermal systems with expert advice from experienced cold-water divers. Whether you're comparing the Arctic X with the Xerotherm or HALO A°R, we can help you choose the right layering system for Melbourne, Victorian and Australian diving conditions.

FAQ

Fourth Element Arctic X Jacket FAQ

Is the Arctic X Jacket suitable for cold-water diving?

Yes. The Arctic X Jacket is designed as a premium drysuit undersuit for cold-water diving, providing exceptional warmth with minimal bulk. It is suitable for recreational, technical and professional divers looking for reliable thermal protection.

Can I wear the Arctic X Jacket on its own?

The Arctic X Jacket is primarily designed to be worn beneath a drysuit. During surface intervals it can also be comfortably worn on its own thanks to its durable outer fabric, full-length zip and practical pocket design.

What makes the Arctic X different from the Xerotherm?

The Xerotherm is a next-to-skin baselayer designed to manage moisture, while the Arctic X Jacket is a premium thermal undersuit that provides the primary insulation for cold-water diving. Many divers wear a Xerotherm beneath the Arctic X for the best overall thermal performance.

Does the Arctic X Jacket restrict movement underwater?

No. Stretch fabrics, articulated sleeves and an ergonomic design provide excellent mobility while maintaining thermal performance, making the Arctic X comfortable for both recreational and technical diving.

Is the Arctic X made from recycled materials?

Yes. The Arctic X range incorporates recycled technical fabrics, combining excellent thermal performance with a more sustainable approach to manufacturing.

Can I machine wash the Arctic X Jacket?

Yes. Machine wash on a cool cycle and line dry. Avoid fabric softeners, bleach, tumble drying, ironing and dry cleaning to maximise the life of the garment.

Need Help?

Need Help Choosing the Right Drysuit Undersuit?

Choosing the right drysuit undersuit depends on your diving environment, water temperature and existing layering system. If you're unsure whether the Arctic X Jacket or HALO A°R is the better option, our team can help you select the most suitable thermal protection for your diving.

Contact Us for Advice