The Boulder 125 1/4 Zip adds versatile thermoregulation to our baselayer collection and has been designed for effortless performance in a modern fit. Utilizing an ultra-light Nuyarn 125 merino fabric with matching eyelet knit strategically placed underarm for increased breathability, there is no better combination of performance, comfort, and durability in the world.

• Superior Bluesign 125GSM Nuyarn merino offers extra loft for an unmatched warmth-to-weight ratio
• 5x faster drying
• Remarkable long-term durability
• Superfine 18 micron non-mulsed Australian merino Wool for maximum softness and wearability
• Incredible stretch and recovery
• Regular fit offers a modern fit with full coverage
• Targeted eyelet placements for increased breathability
• No-chafe flatlock seams
• Gusseted Armpits
• Machine Washable
• Hang-Dry Loop
• YKK Zipper