Smartwool Merino Base Layer LS – Iron Heather

Experience unparalleled comfort and performance with the Smartwool Merino Base Layer LS in Iron Heather. Crafted from 100% ZQ-certified Merino wool with a fabric weight of 250 g/m², this long-sleeve crew neck top is designed for men seeking a reliable base layer for cold weather activities. The interlock knit construction and 18.5 micron fiber diameter provide a soft, non-itch feel against the skin, while flatlock seams and offset shoulder panels minimize chafing and maximize mobility.

Advantages

This base layer offers exceptional odor resistance, moisture-wicking, and temperature regulation, keeping you dry and comfortable during high-output pursuits. The slim fit ensures a streamlined silhouette that layers easily under mid-layers or outerwear. Breathable and fast-drying, it adapts to changing conditions, making it an essential piece for hiking, skiing, running, or everyday wear in cold climates.

Suitable for

• Cold weather outdoor activities (hiking, skiing, snowboarding)
• Running and high-intensity training in cool conditions
• Everyday wear as a comfortable base layer
• Layering under mid-layers or jackets

Key specifications

• Material: 100% Merino Wool (ZQ-certified)
• Fabric Weight: 250 g/m²
• Fit: Slim Fit
• Neckline: Crew Neck
• Sleeve Length: Long Sleeve
• Gender: Men's
• Color: Iron Heather
• Seam Construction: Flatlock Seams
• Shoulder Panels: Offset shoulder seams
• Fiber Diameter: 18.5 microns
• Knit Type: Interlock Knit
• Care: Machine Wash Cold, Tumble Dry Low

Recommendations

For optimal performance, pair this base layer with a mid-layer fleece or insulated jacket. Machine wash cold and tumble dry low to maintain the wool's natural properties. Avoid fabric softeners and bleach.