Fourth Element Thermocline

Discover the Fourth Element Thermocline range — the world-leading neoprene-free thermal protection designed for diving, snorkelling, and open-water adventures. Enjoy the warmth of a 2–3mm wetsuit with the comfort and flexibility of a rash vest, made using sustainable, recycled fabrics that dry fast and pack light. Ideal for travelling divers, freedivers, photographers, and those needing reliable warm-water insulation without the bulk. Pair Thermocline tops, leggings, vests and hoodies for custom layering, excellent buoyancy control, and unmatched freedom of movement.