Collection: Active Stretch Thermals - Midweight Warmth

Comfort knit base layers, flat seams. Ideal for performance sports or casual wear.

  • Fabric & Fit - Made from soft, comfort‑knit fabric composed of 86% polyester and 14% spandex (~180 gsm), the Active Stretch line offers four‑way stretch that hugs your body and moves with you for unrestricted performance. 
  • Moisture Control - Equipped with Acclimate Dry+ hydrophobic yarns, this collection quickly wicks sweat away from the skin to help you stay both dry and warm while preventing overheating. 
  • Warmth Level - Designed as a midweight thermal layer, it delivers moderate warmth—ideal for layering under jackets or wearing alone in brisk weather without feeling bulky. 
  • Construction Details - The flat-seam stitching enhances durability and comfort, minimizing irritation while preserving stretch and fit.

6 products

  • 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.

  • Four way stretch

    Four-way Stretch

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

  • Polarmax Warmer Icon

    Active Stretch Midweight Warmth

    86% Polyester, 14% Spandex; 180 gsm

    Comfort knit thermal baselayers.

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