Fourth Element Xerotherm Long Sleeve Top

The Xerotherm Long Sleeve Top forms the essential first layer of your drysuit thermal system. Unlike traditional thermal garments that rely purely on thickness, Xerotherm focuses on moisture management, breathability and maintaining a thin layer of insulating air against the skin. The result is a baselayer that keeps you noticeably drier throughout long dives while adding minimal bulk or buoyancy.

Its lightweight construction makes it equally suitable beneath technical undersuits such as the Fourth Element Arctic or HALO A°R, or worn on its own beneath a neoprene drysuit in milder conditions.

• Fourth Element Xerotherm Long Sleeve Top

Why Choose the Fourth Element Xerotherm Long Sleeve Top?

The Fourth Element Xerotherm Long Sleeve Top is designed as the foundation of an effective drysuit layering system. Worn directly against the skin, it creates a comfortable microclimate by rapidly moving moisture away from the body while maintaining a thin layer of insulating air. This combination helps divers stay warmer throughout the dive while avoiding the clammy feeling that traditional thermal clothing can create.

Unlike everyday thermal garments, the Xerotherm was developed specifically for scuba diving. Constructed from genuine Polartec® Power Stretch®, it combines exceptional stretch, durability and moisture management in an extremely lightweight package. The result is a baselayer that adds very little bulk beneath a drysuit while significantly improving overall comfort during long cold-water dives.

The Importance of a Quality Baselayer

Many divers focus on choosing the warmest undersuit, but the layer worn directly against your skin is equally important. Perspiration created during equipment setup, carrying cylinders or simply from body heat can remain trapped inside your thermal system. Once moisture builds up, insulation becomes less effective and divers often begin to feel cold long before the dive is over.

The Xerotherm addresses this by transporting moisture away from the skin through the fabric, allowing your outer thermal layer to perform more efficiently. Whether you're diving recreationally or spending extended periods underwater, effective moisture management can make a noticeable difference to your comfort.

Designed for Layering Under a Drysuit

The Xerotherm Long Sleeve Top is designed to work as part of a complete layering system. In milder conditions it can be worn on its own beneath a neoprene drysuit, while colder water typically calls for pairing it with an insulating undersuit such as the Fourth Element Arctic or HALO A°R. By separating moisture management from insulation, each layer performs the job it was designed to do.

The slim athletic fit sits close to the body without restricting movement, while flatlock seams reduce pressure points beneath shoulder straps and harness systems. The extended body length helps prevent gaps developing between the top and leggings during the dive, and integrated thumb loops make it easier to put on a drysuit without the sleeves riding up.

Ideal for Melbourne and Victorian Diving

Cold-water diving around Melbourne, Port Phillip Bay and the Mornington Peninsula often involves water temperatures that require a properly planned thermal layering system. Whether you're shore diving at Flinders Pier, exploring Rye Pier or completing longer boat dives offshore, remaining warm helps improve both comfort and concentration underwater.

The Xerotherm has become a popular choice for Victorian divers because it provides excellent moisture management without adding unnecessary bulk. Technical divers, recreational divers and underwater photographers all benefit from its lightweight construction and ability to perform during long dives where maintaining consistent body temperature becomes increasingly important.

Who Is the Xerotherm Long Sleeve Top Best For?

The Xerotherm is an excellent choice for divers looking to improve the performance of their existing undersuit without dramatically increasing bulk. It suits recreational divers building their first cold-water layering system, experienced technical divers spending extended periods underwater, and anyone who wants a comfortable baselayer that performs reliably in demanding conditions.

If you're unsure which thermal layering system is best for your drysuit or the conditions you typically dive in, our team can help you choose the right combination of baselayers and undersuits to keep you comfortable throughout the year.