Quick Facts

• Type: First-layer thermal underwear set (top + bottom)

• Material: 85% polyester, 15% spandex

• Fabric: Two-component pile fiber with moisture-wicking interior

• Temperature Range: Zero and sub-zero conditions

• Antimicrobial: freshFX silver-based odor control

• Weight: 0.7 lbs (S) to 0.84 lbs (XXL)

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The M-Tac Thermoline Thermal Underwear Set is designed as a performance-driven first layer for cold-weather activity. Built for physical training, field use, and daily wear in freezing conditions, it regulates temperature while actively moving moisture away from the skin.

The two-component pile fiber construction wicks sweat, accelerates drying time, and helps maintain warmth without trapping excess moisture.

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Built for Cold Weather Performance

• Moisture-Wicking Interior – Moves perspiration off the skin to reduce chill.

• Rapid Drying Fabric – Dries faster than cotton, wool, nylon, or acrylic.

• Thermoregulation – Maintains core warmth during zero and sub-zero use.

• Antibacterial Protection – freshFX silver-based treatment reduces odor buildup.

• Breathable Construction – Supports extended physical activity without overheating.

• Stretch Fit – Spandex blend enhances mobility and comfort under outer layers.

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Specifications

• Material: 85% polyester / 15% spandex

• Construction: Two-component pile fiber

• Use: First-layer base layer

• Weight Range:

  • Size S: 0.7 lbs

  • Size XXL: 0.84 lbs

• Odor Control: freshFX silver-based application

• Intended Conditions: Zero and sub-zero temperatures

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FAQ

Is this designed for extreme cold?
It is built for zero and sub-zero conditions as a first-layer base. Pair with insulating and outer shell layers for full cold-weather systems.

Does it retain odor after heavy use?
No. The freshFX silver-based treatment provides antibacterial protection and odor reduction.

Is it suitable for high activity levels?
Yes. The moisture-wicking and breathable design supports physical activity, sports, and field movement.

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Reliable moisture control, odor resistance, and cold-weather thermoregulation make the M-Tac Thermoline Thermal Underwear Set a foundational layer for winter operations and everyday cold climates.