Description

Meet the Beneunder High-Stretch Fleece Base Layer — engineered with dual-sided brushed fleece and high-stretch fibers for versatile warmth and comfort. Available in two thickness levels, it adapts to changing outdoor conditions:

  • Mid-Warmth (5°C–15°C): Lightweight insulation that boosts warmth by +2.1°C and retains heat by 37.8%.
  • High-Warmth (-5°C–5°C): Enhanced thermal fibers that boost warmth by +1.9°C and lock in heat by 44.1%.

Moisture-wicking technology keeps you dry, while the slim fit and stretch construction ensure freedom of movement without bulk. Perfect for layering or wearing solo, whether you’re on the trail, camping, or in town.

Highlights:

  • Two warmth levels: Mid-Warmth (5°C–15°C) & High-Warmth (-5°C–5°C)
  • Dual-sided brushed fleece traps heat (+2.1°C / +1.9°C warmth boost)
  • Hollow-core fibers improve heat retention (37.8% / 44.1%)
  • 360° stretch with up to 3.4× elongation, no restriction
  • Moisture-wicking fibers: 521% absorption, 279.6 mm/s breathability
  • Flat-seam construction for skin comfort, no chafing

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