Low-Bulk Thermal Protection – Keeps your feet warm without adding unnecessary bulk, perfect for layering under drysuits or wetsuits. Dual-Layer Comfort – Two-layer construction provides exceptional warmth and comfort for long dives in cold water. Eco-Friendly Materials – Made with recycled fabrics, combining sustainability with high-performance thermal insulation. High Insulation Performance – Efficiently retains heat while maintaining flexibility and comfort in demanding conditions. Reliable When Wet – Maintains thermal protection even if exposed to water, ensuring warmth throughout your dive. The Fourth Element Arctic Undergarment delivers exceptional warmth with a lightweight, low-bulk design built for cold-water diving. Featuring a dual-layer construction with recycled polyester fabrics, it provides reliable thermal protection while maintaining comfort and freedom of movement under drysuits. Designed for use beneath neoprene, membrane, and tri-laminate suits, the Arctic uses fast-wicking, high-insulation materials to create a warm, dry micro-climate throughout the dive. A minimalist, performance-driven design makes it an essential layering piece for divers who demand warmth without added bulk.