Smartwool Classic Merino Base Layer Long Sleeve Boxed - Black, Size S

Experience the ultimate in comfort and performance with the Smartwool Classic Merino Base Layer Long Sleeve Boxed in Black, size Small. Crafted from 100% Merino wool with a fabric weight of 250 gsm, this base layer offers exceptional warmth, breathability, and moisture management for cold weather activities. The slim fit and flatlock seams provide a sleek, chafe-free fit, while the crew neck and long sleeves ensure full coverage. Naturally odor-resistant and temperature-regulating, it keeps you comfortable during high-output pursuits. With a UPF 50+ rating and ZQ-certified Merino wool, this top is both functional and sustainable.

Advantages

Merino wool naturally wicks moisture, regulates temperature, and resists odors, making it ideal for extended wear. The interlock knit adds durability and softness against the skin. Flatlock seams reduce bulk and prevent irritation, and the slim fit layers easily under outerwear.

Suitable for

• Cold weather hiking, skiing, and snowboarding
• Running and cycling in cool conditions
• Everyday winter layering

Key specifications

• Material: 100% Merino Wool
• Fabric Weight: 250 gsm
• Fit: Slim Fit
• Sleeve Length: Long Sleeve
• Neckline: Crew Neck
• Gender: Women's
• Size: Small (S)
• Color: Black
• Seam Construction: Flatlock seams
• Odor Resistance: Natural
• Temperature Regulation: Yes
• Moisture Wicking: Yes
• Breathability: Yes
• UPF Rating: UPF 50+
• Fiber Micron: 18.5 microns
• Sustainability: ZQ-certified Merino Wool
• Care Instructions: Machine wash cold, tumble dry low
• Intended Use: Base Layer for cold weather activities
• Knit Type: Interlock knit

Recommendations

For best results, layer under a mid-layer and shell. Machine wash cold with like colors, tumble dry low. Avoid fabric softeners.