The Fourth Element Thermocline Womens Swimsuit is a thermal swim suit that is neutrally buoyant but equivalent to a 2 or 3mm wetsuit. Made using recycled ghost gear Thermocline is actively good for the environment & is a great alternative to neoprene. Who's Thermocline For? Thermocline is great for any watersports because it is soft, breathable & neutrally buoyant. Wear it alone in warmer waters to keep your core warmer or under your wetsuit to make it warmer still. Worn on the surface Thermocline material wicks moisture away from you keeping you feeling dry & warm & it dries much faster than neoprene too. Neoprene free Outer contains 78% recycled Nylon Lightweight Wind & waterproof fabric Breathable Neutrally buoyant Machine washable Equivalent of 2mm neoprene 33% Econyl® Recycled Nylon / 57% Polyester / 10% Elastane Machine Wash at 30°C About Fourth Element Advanced fabric technology is the heart of Fourth Element's success, using the latest fibres to create some of the warmest dive wear available. The UK based Fourth Element was born from a need of high-quality & warm exposure protection for diving professionals. The founding fathers had backgrounds in design & human physiology allowing them to create a range of wetsuits, undersuits & exposure protection for all environments.