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1.0 Men's Thermasilk® Heritage Crew

$60.00 S481-105S
Size Chart

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 Crew provides warmth without bulk and goes great with our Thermasilk Pants.


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


  • Natural 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 6 reviews
Awesome Comfort for Southeast US Winter Jammies

The Large size for Men is close enough, comfort around the house is sublime. South GA North FL is easy to over spec your "long underwear" degree of warmth provided. I run hot. These are perfect as jammies around the house, and are great under clothes for outdoor activities.
Fit and Finish: Hard to keep my signo from putting them in the dryer, so far so good. They feel just like the ski-skins I remember wearing in Colorado years ago. Zero issues under clothes and outdoors all day. Minor criticism, a bit too much fabric in the crotch doesn't flatter your figure, BUT HEY, doesn't insult it too badly either. FEELS FANTASTIC for our sporadic cold snaps around the freezing mark here in the Southeast US. At $60.00 per piece for top and bottom, pricey. But I elected to splurge, and I was by no means disappointed.
Thanks. I'll be back.

Michael Bottcher

Excellent quality

Love these light silk tops!

Right layering thickness, doesn’t let you chill!

Great quality

Good quality stuff. Bought as a present

Tall’s sizes now

Was glad to see you carrying y’all sizes. My husband is 6’7” and in 1998 I purchased him some that weren’t tall up until this year he wore them. So I ordered him a set. They actually are long enough. Thanks Terramar