Smartwool Merino Sport Ultralite Long Sleeve Shirt - Charcoal, Size S

Struggling to stay comfortable during high-output activities in changing weather? This Smartwool Merino Sport Ultralite Long Sleeve Shirt solves that by combining the natural performance of merino wool with the quick-drying, soft feel of Tencel™ Lyocell. The result is a lightweight, breathable layer that keeps you dry and odor-free from trailhead to summit.

Who is it for

Built for active men who hike, run, train, or simply need a versatile everyday base layer. The athletic fit and long sleeves make it ideal for cool mornings, breezy ridgelines, or layering under a shell when the temperature drops.

Main features

• 53% ZQ-certified Merino Wool, 47% Tencel™ Lyocell blend for softness, breathability, and natural odor resistance
• Ultralite 135 g/m² fabric weight offers excellent temperature regulation without bulk
• Flatlock seams and offset shoulder seams prevent chafing under pack straps
• UPF 20+ sun protection for exposed trails
• Quick-drying and moisture-wicking to keep you comfortable during intense efforts
• Machine washable for easy care

Specifications

• Material: 53% Merino Wool, 47% Tencel™ Lyocell
• Fabric weight: 135 g/m²
• Fit: Athletic
• Sleeve length: Long sleeve
• Neckline: Crew neck
• Color: Charcoal
• Size: S
• Gender: Men's
• Odor resistance: Natural (Merino Wool)
• Moisture wicking: Yes
• Breathability: High
• Quick drying: Yes
• Seam construction: Flatlock seams
• Shoulder seams: Offset
• UPF rating: UPF 20+
• Wool source: ZQ-certified Merino Wool
• Care: Machine wash cold gentle cycle, tumble dry low

Tips

For best results, wash inside out with like colors and avoid fabric softeners to preserve the natural properties of merino wool. Layer under a wind shell for windy summits or wear alone on mild days—this shirt adapts to your pace and the weather.