TD Base Layer Long Underwear | Merino Bamboo Tactical Base Layer Bottom

Second Skin Performance. Built for Every Condition.

The TD Base Layer Long Underwear is built to handle cold mornings, long missions, and everything in between. Designed as a true tactical base layer bottom, it combines the natural performance of merino wool with the breathability and softness of bamboo for all-season adaptability.

Constructed from a 200gsm merino bamboo blend, this layer regulates temperature, wicks moisture, and resists odor while staying comfortable against the skin. It keeps you warm when it is cold, cool when it heats up, and dry through high-output movement.

Built for movement, it features a gusseted crotch, ergonomic front panel, and wrap-around leg construction to eliminate restriction and reduce friction. The plush elastic waistband and flatlock seams ensure all-day comfort under kit, while the flip-top fly provides quick access when needed.

If you are searching for merino wool base layer bottoms, bamboo performance long underwear, tactical thermal base layer pants, or moisture wicking base layer leggings, this is built to perform.

Why We Love the TD Base Layer Long Underwear:

It is the layer you forget you are wearing. Comfortable, breathable, and ready for any environment.

Key Features of the TD Base Layer Long Underwear:

• Merino wool and bamboo blend for temperature regulation and comfort
• Moisture wicking and quick drying performance
• Naturally odor resistant and antimicrobial
• 200gsm fabric weight for all-season use
• Gusseted crotch for unrestricted movement
• Flip-top fly for quick access
• Darted 2-ply front panel for ergonomic fit
• Stretch finished fly and leg openings for easy wear
• Non-chafing plush elastic waistband
• No side seams with wrap-around leg panels for comfort
• Low-bulk flatlock seams to reduce irritation
• Reflective logo hit and sueded label details
• Custom Shadow Tiger Stripe design
• Certified mulesing-free Merino wool
• OEKO-TEX Standard 100 certified fabric

Materials & Construction

• 67% Bamboo Rayon / 28% Merino Wool / 5% Spandex
• Fabric weight: 200gsm

Care Instructions

• Turn inside out before washing
• Machine wash cold on gentle cycle with like colors
• Do not bleach
• Line dry recommended or tumble dry low
• Avoid high heat to preserve stretch fibers

Fit: Athletic cut