• Acclimate Dry Icon

    Acclimate Dry+

    Keeps you dry, warm and comfortable with our exclusive Acclimate Dry+ technology enabled by hydrophobic yarns that move moisture away from your body.

  • Polarmax Odor Blocking

    Odor Blocking

    Enhanced freshness and odor control - guaranteed for 20-30 washes.

  • Four way stretch

    Four-Way Stretch

    Hugs your body and moves with you -- no extra bulk, improved performance.

  • Microfleece Mountain Weight

    92% Polyester, 8% Spandex; 230 gsm

    Microfleece gets is warmth from fleecing the inside of our heavy weight blend of Acclimate Dry+. The soft fleecy fabric keeps a layer of warm air next to your skin.

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Collection: Micro Fleece Thermals - Mountain Weight Warmth

The microfiber polyester yarns used in our micro fleece thermals are what make this fabric super soft to the touch. If you’re looking for billowy warmth without the weight, our micro fleece long underwear is the most durable and breathable option on the market for you. When it’s really chilly, this heavyweight thermal is an excellent choice that will definitely keep you warm. Be sure to browse all the micro fleece thermal options we have in stock today.

Polarmax Micro Fleece features:

  • Billowy warmth without weight
  • Acclimate Dry hydrophobic for moisture management
  • Microfiber polyester is exceptionally durable
  • Flat seam construction for seam strength and longevity