Thermal Fusion is a high performance diving undergarment with maximum warmth and unrivaled flexibility and fit. Thermal Fusion was rigorously tested by professionals to ensure the highest level of comfort and warmth. Proven by science. Independent laboratory tests by the Sport Innovation Center (SPIN) validate the superior insulation value of the Thermal Fusion. Cold water immersion and controlled cold weather environmental tests confirm unparalleled effectiveness in protecting skin and core temperatures. Comparative testing against our competitors' top-rated undergarment confirms superiority. The science proves that the Thermal Fusion performed best overall in preventing heat loss in extreme environments.