Following the success of the Halo A°R undersuits and gloves, Fourth Element introduces the next evolution of the system — Halo A°R Socks.
Designed to extend Halo A°R performance even further, these socks bring the same advanced A°RGON™ aerogel technology to the extremities. By targeting one of the most heat-critical areas of the body, Halo A°R Socks deliver Fourth Element’s warmest drysuit socks to date, without unnecessary bulk or buoyancy.
Built for cold, demanding and extended dives, Halo A°R Socks provide outstanding thermal protection while maintaining comfort and freedom of movement inside the drysuit — an essential balance for serious cold-water diving.
Designed for Cold, Demanding Diving
Feet are one of the first areas to suffer heat loss during cold dives, especially on long runtimes or repetitive days in the water. Halo A°R Socks are engineered specifically to address this challenge, offering high-efficiency insulation that continues to perform under pressure.
Despite their impressive warmth, the socks remain flexible and low profile, ensuring they don’t compromise fin feel, trim, or overall comfort inside the drysuit. The result is a sock that performs exceptionally well in harsh conditions while remaining practical for real-world diving.
Key Features at a Glance
- Fourth Element’s warmest drysuit socks
- Soft fleece lining for comfort and warmth
- A°RGON™ aerogel insulation for exceptional thermal efficiency
- Durable, water-repellent outer fabric
- Lightweight, low-bulk construction to minimise buoyancy and restriction
Advanced Thermal Technology
Halo A°R Socks incorporate highly advanced thermal technology and one of the most insulating materials ever developed. Using innovation originally created for space exploration and cryogenics, the Halo A°R system exceeds the expectations of traditional diving insulation.
At the core of the socks is A°RGON™ aerogel, integrated into a compression-resistant matrix. This allows the insulation to maintain its performance under pressure — a critical requirement in diving environments where many materials lose efficiency with depth.
What Is A°RGON™ Aerogel?
A°RGON™ is a specialised form of aerogel developed for insulation in spacecraft and cryogenic applications due to its superior thermal properties.
Traditional aerogel is created by removing liquid from a gel and replacing it with air, producing a lightweight, hollow structure with exceptional insulating capability. A°RGON™ adapts this concept by embedding the aerogel into a flexible foam matrix, allowing it to function effectively in a diving context.
This construction delivers phenomenal insulation performance while remaining thin, flexible and resistant to compression — enabling the Halo A°R Socks to achieve extreme thermal protection with reduced bulk and buoyancy.
Comfort, Fit and Everyday Practicality
Halo A°R Socks feature a three-layer construction throughout, making them slightly thicker than Fourth Element’s Hotfoot Pro socks. Because of this, correct sizing is essential.
The socks should be ordered according to shoe size, not drysuit boot size, as a snug fit is key to maintaining warmth and performance. In some cases, there may be limited room inside certain drysuit boots when using the Halo A°R Socks.
For divers using an Argonaut drysuit, removing the internal footbed can create additional space if required. When purchasing a new drysuit, it may also be worth considering sizing the boots one size up — particularly if you sit at the upper end of a size range.
The outer fabric is wind and water repellent, allowing the socks to be worn comfortably throughout the day, both in and out of the water. Added stretch ensures a secure fit, while the socks remain machine washable for easy care between dives.
Key Performance Highlights
- A°RGON™ aerogel insulation – extreme performance thermal technology
- High warmth, low bulk – reduced buoyancy and restriction
- Water-repellent outer layer for all-day comfort
- Stretch fabric for a secure, supportive fit
- Machine washable for practical everyday use
Final Thoughts
Halo A°R Socks represent a significant step forward in cold-water diving insulation. By applying space-grade thermal technology to one of the most heat-critical areas of the body, Fourth Element has created a sock that delivers genuine performance gains without compromising comfort, mobility or trim.
For divers undertaking cold, long or repetitive dives — where thermal efficiency matters most — Halo A°R Socks are a serious upgrade to any drysuit system.
Lastly, we’d love to hear about your diving journey so far and what you’re looking for in your own scuba gear. If you have any questions along the way, you’re more than welcome to email us at support@mikesdivestore.com, schedule a video consultation, or drop by our Chiswick store for expert, face-to-face advice.
