Men's Classic Thermal Merino Base Layer 3/4 Bottom

$115
Color: Black
  • Free shipping on orders $150+
  • Free pickup at our Arlington, TX store today
  • Free 30-day returns
Description

Help keep your ski boots, hiking boots, and running shoes free of bulk and friction with our Men's Classic Thermal Merino Base Layer 3/4 Bottom. 100% responsibly sourced Merino wool provides ultimate breathability and comfort, while a newly redesigned base layer pants fit helps reduce sag and excess fabric—perfect for your layering needs.

Features
  • Slim
  • Our slim fit is intended to follow the contours of the body
  • Fabric helps combine the moisture management, temperature regulation, and odor resistance of 100% Merino wool with interlock knit for comfort
  • Flatlock seam construction designed to help increase comfort and minimize chafing
  • Fully functional fly
  • Merino-lined elastic waistband designed for comfort
  • 100% Merino next to skin
  • Size medium inseam: 21.5" (55 cm)
  • Made in Vietnam: 100% Merino Wool. Exclusive of Decoration.
About the brand

Smartwool brings the magic of merino wool to life — keeping you warm, dry, and comfortable no matter the season. From performance socks to base layers, every piece is designed for adventure. At Mountain Sports, we love Smartwool because it proves comfort and sustainability can go hand in hand, from trail to town.

Shop all Smartwool

SKU SW016365001
Size guide

Smartwool Size Chart - Men's Apparel

Smartwool Sizing Chart

Measurements are in inches, unless otherwise noted. Charts reflect body measurements, not garment measurements.

Men's Apparel & Base Layers:

Size Chest Waist Hip Arm Length Inseam
S 36 - 38 29 - 31 36 - 38 31 - 32 30 - 31
M 39 - 41 32 - 34 39 - 41 32 - 33 31 - 32
L 42 - 44 35 - 37 42 - 44 33 - 34 32 - 33
XL 45 - 48 38 - 40 45 - 48 34 - 35 33 - 34
XXL 49 - 51 41 - 44 49 - 51 35 - 36 34 - 35

How to measure - Chest: measure under the arms, around the fullest part of your chest and back. Waist: measure around your natural waistline, keeping the tape a bit loose. Hip: measure around the fullest part of your hip, parallel to the floor. Arm length: with your elbow slightly bent, measure from the center back of your neck, across the top of your shoulder, to the elbow and down to the wrist bone. Inseam: measure along the inside of the leg from crotch to ankle bone, or measure a well-fitting base layer pant from the crotch seam to the bottom of the leg.

Smartwool clothing runs true to size. Smartwool products are designed to retain their fit and shape; following the care instructions on the label will help avoid shrinking or stretching.

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Free 30-day returns, and help finding the one that is.

Free shipping over $150

Shipped nationwide since '96. Some exclusions apply.