The Boulder 125 Crew is the foundation of the A/SYS-1 range and has been designed to add effortless performance in a modern fit. The Boulder 125 Crew is the foundation of the A/SYS-1 range and has been designed to add 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. Features Superior BluesignA(R) 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