Thermal Fusion underwear 4XL

The Thermal Fusion is Aqua Lung’s highest performance diving undergarment, maximizing warmth while providing unrivaled flexibility and fit.
Our patented Thermal Core Technology, a dual layer design, offers the diver with an unlimited range of motion while maintaining a streamlined fit. The inner layer, a relaxed cut thermal core constructed of 
Polartec® 200 fleece, delivers superior warmth. The outer layer, a Polartec® Power Stretch Pro® fleece, applies compression which streamlines the inner core to the divers body. The 
result is a custom fit with maximum range of motion. The superior insulation value of the Thermal Fusion has been validated in independent laboratory tests by the Sport Innovation Center (SPIN).
SPIN collaborates with Olympic and Paralympic athletes and is a breakthrough leader in sport technology. They performed cold water immersion and controlled cold weather environmental tests to 
determine the effectiveness of dive garments in protecting skin and core temperatures. Comparative testing against our competitor’s top rated undergarment confirms the Thermal Fusion 
superiority. The science proves that the Thermal Fusion performed best overall in preventing heat loss in
extreme environments!