Men's thermal underwear is a base insulating layer of clothing designed to protect against the cold and wick away moisture. It is made from synthetic materials (polyester, elastane) and features the proprietary Omni-Heat (heat-reflective lining) and Omni-Wick (moisture control) technologies.

A well-known manufacturer has created a fundamentally new generation of thermal underwear using innovative technologies based on the patented Omni-Heat Thermal Reflective heat reflection system.

It is easy to recognize by the silver-toned aluminum finish on the lining. The uniqueness of this system is that the aluminum layer does not fully cover the fabric but forms a dot matrix on a breathable base, so the lining reflects the body's own heat on one side and releases the excess through the spaces between the dots on the other. This keeps your body temperature comfortable.

Clothing made with Omni-Heat technology has exceptional heat retention and keeps on average 20% more warmth than other insulation.

• Fit: the garment hugs the body closely (a "second skin" effect), doesn't restrict movement and wears comfortably under everyday or sports clothing
• Set: usually consists of a long sleeve top and long johns with an elastic waistband
• Temperature range: +7 to -30 °C (45 to -22 °F)
• Washing: 30°C

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