Bi-Ply Thermal Bottom – Men's

When the temperature drops and you need a reliable base layer under work pants or jeans, the Bi-Ply Bottom is our pick for men who want serious warmth without bulk. Double-layer spun polyester traps air between the layers to lock in heat, while MTF moisture transport fibers keep sweat moving away from your skin. Flat seam construction means no chafing on long cold days.

• Double-layer spun polyester jersey knit traps air between layers for midweight insulation (Warmth Factor 7)
• MTF fibers actively pull moisture away from skin to keep you dry during high-output activity
• Flat seam construction eliminates pressure points and chafing under outerwear
• Relaxed fit with fly front and plush-back elastic waistband layers cleanly under jeans or work pants
• Available in Black — a clean, versatile base that pairs with anything in your cold-weather kit