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)

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.

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.

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

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.

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.

Men's Underwear

M-Tac Thermoline Thermal Underwear Set – First Layer Cold Weather Base Layer