Designed for training in cold conditions, the Mizuno Premium Merino men's underwear shirt combines Breath Thermo technology with Merino wool, generating warmth from body moisture while providing thermal insulation and odor protection.
Breath Thermo
This is a unique type of insulation fabric which generates heat from the absorption of moisture. Heat is generated via a chemical exchange between perspiration and the properties of the Breath Thermo Fabric. This is especially useful for protecting the human body from cold temperatures.