Fourth Element Men's Xerotherm Long Sleeve Baselayer Top
- NASA-Inspired Insulation: Made with Polartec® Powerstretch® fabric to trap air and retain heat better than water.
- Lightweight & Low Bulk: Delivers warmth without compromising mobility or adding unnecessary buoyancy.
- Fast-Wicking & Quick-Drying: Keeps skin drier and more comfortable during and after dives.
- Reliable Wet Performance: Maintains insulation properties even when wet, ensuring dependable thermal protection.
- Durable & Easy Care: Hardwearing, machine washable, and compatible with eco-friendly Sub30 Technical Garment Wash.
Engineered for serious divers, the Fourth Element Men's Xerotherm Long Sleeve Top is the ultimate baselayer for drysuit diving. Crafted with advanced Polartec® Powerstretch® fabric originally developed for NASA, it traps a thin layer of insulating air against the skin—far superior to water—offering exceptional warmth and comfort. Whether worn alone under a neoprene drysuit or layered beneath another undersuit, the Xerotherm delivers outstanding thermal performance without adding bulk or buoyancy. Fast-wicking, durable, and machine washable, it's designed to perform even when wet—keeping you dry, warm, and ready for your next dive.
WARNING: This product can expose you to chemicals including lead, which is [are] known to the State of California to cause cancer and reproductive harm. For more information go to www.P65Warnings.ca.gov


