Smartwool Merino Sport Ultralite Long Sleeve Top - Charcoal

Hit the trail at dawn in this Smartwool Merino Sport Ultralite Long Sleeve Top. Built for runners and hikers who push hard in cool conditions, the charcoal top blends ZQ-certified merino wool with Tencel™ lyocell for a featherlight, breathable layer that moves with you. Flatlock seams and offset shoulder seams eliminate chafing under a pack, while reflective details keep you visible on low-light routes.

Key specifications

• Material: 53% Merino Wool, 47% Tencel™ Lyocell
• Fabric weight: Ultralight (approx. 120-130 g/m²)
• Fit: Athletic / Regular
• Sleeve type: Long sleeve with raglan sleeves
• Neckline: Crew neck
• Colour: Charcoal
• UPF rating: UPF 20+
• Wool certification: ZQ-certified Merino wool
• Care: Machine wash cold, tumble dry low

Why choose it

Merino wool naturally regulates temperature, wicks moisture, and resists odour, so you can wear this top for multiple workouts between washes. The Tencel™ lyocell adds a silky feel and enhances quick-drying performance. Flatlock seams and raglan sleeves provide unrestricted movement, making it an ideal base layer for active days.

Ideal use cases

• Trail running in cool weather
• Hiking with a backpack
• High-intensity training sessions
• Everyday active wear

Good to know

This top is designed for performance, not bulk. It layers easily under a shell or works alone on mild days. The reflective elements are subtle but effective for dawn or dusk visibility. For best results, wash cold and avoid fabric softeners to preserve the wool's natural properties.