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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
36% Viscose, 28% Acrylic, 28% Cotton, 8% Spandex – soft and cozy with a fleece-like texture, combining natural comfort, lightweight warmth, and flexible stretch for a flattering fit.
• Free Shipping on all orders.
• 30-day Return: Feel free to send your item back within 30 days of receiving the product.
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Based on moderate activity with a basic inner layer; increase warmth for wind or humidity.
Recommended range: 5–15°C / 41–59°F
Dual-Sided Brushed Fleece — Lasting Warmth
Soft brushed fleece inside and out adds +2.1°C of warmth and 37.8% better heat retention. Cozy against the skin while locking in heat for longer.
High-Stretch Fabric — 360° Freedom
Fabric stretches up to 3.4× with 94.5% recovery, moving effortlessly with your body. From climbing to stretching, enjoy unrestricted motion.
Quick-Dry Fibers — Stay Dry, Stay Warm
Advanced fibers wick moisture instantly, with 521% absorption and 279.6 mm/s breathability. Keeps you dry and insulated in changing conditions.
Flat-Seam Construction — Gentle on Skin
Smooth, flat seams eliminate chafing and irritation. Perfect for all-day wear against the skin.
Two Collar Heights, Two Warmth Levels
This style comes in two warmth options based on collar design:
Medium Warmth with a semi-high collar, and High Warmth with a full high collar.
Same streamlined fit, different coverage for changing temperatures.