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1.0 Men's Thermasilk® Heritage Pant

$60.00 S483-010S
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Over forty years ago Terramar was the first company to introduce pure silk performance base layer products. Today, Thermasilk is still the standard for people wanting a natural and breathable garment that is extremely lightweight and will keep you warm, dry and comfortable in all your indoor and outdoor adventures. Low profile design fit great under regular clothes to many any environment warmer. Our Thermasilk Pant provides warmth without bulk and goes great with our Thermasilk Crew.


  • Natural Thermoregulation Technology keeps you warm and dry
  • Ultra-lightweight with naturally breathable
  • Stretch comfort waistband
  • Rib trim for unrestricted movement.


  • Thermoregulation technology provides comfort through a wide range of temperatures
  • UPF rated for sun protection
  • Warmth without the bulk
  • Natural Breathability allows you to warm up or cool down with ease
  • Moisture Management moves moisture from the skin to keep you warm and dry

Customer Reviews

Based on 11 reviews
Meredith Goldberg

Love these naselauer pants

Keith Richardson
Silk is best fiber for lightweight warmth and unequalled breathability.

Silk is the perfect choice for my favorite activity-riding horses. It is so lightweight it does not impede movement. i wear it for warmth and protection from abrasion in the winter and summer for abrasion protection. it is the only fiber that does not overheat me in summer due to incredible breathability. Also great for wearing inside office or home when thermostats are turned down.

Great Pants!


John Coelho
Best long underwear ever!

Still the same great product.

Martin Moffitt
nothing finer!

love em' they keep you snug as a bug.. you don't even know you have them on!