MTHD Merino Base Layer Long Underwear Bottoms L1 - XL ONLY!

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$ 69.99 $ 29.99


Simple SKU: MTHD-FA-19-BB1-SM
$ 29.99
Return Policy

MTHD L1- Next-to-skin Base Layer

The Merino Wool base layer collection is part of the L1 layering system, designed to be worn as a next-to-skin base layer.

Why Merino Wool?  Merino wool is the best material used for active individuals who need warmth, moisture management and comfort. We choose this as our Level 1 next to the skin layer because nothing else compares and this next to skin garment is the foundation of your whole clothing system. If this part fails your whole system fails. We use 100% certified Merino wool sourced from sustainable farmers.  Merino is: warm when wet, fire retardant, anti-microbial, stretchy and ultra-soft.

The Merino Long Underwear keeps you warm, dry, comfortable and has antimicrobial properties to reduce odor.  A flip-top fly allows easy access and an interior grippy waistband print helps to keep shirts tucked in.  Generous leg length allows most sizes to fit comfortably to tuck into socks.  Guaranteed to be your go-to long underwear.

Materials: 100% Merino Wool, 17.5 microns, 170g/m2  


  • Low Bulk Flatlock Seams
  • Flip-up Fly Opening
  • Crotch Gusset
  • Wrap-around Side Body Panels
  • Grippy Interior Back Waistband
  • Custom All-over Topography Print
  • Super-soft Sueded Wrap Label
  • Reflective Thigh Logo

 MTHD = Mountain, Tundra, H2O, Desert

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