Face the Cold with Confidence
The Smartwool ISTO Balaclava is your essential layer for high-output winter activities. Engineered with premium merino wool and a seamless construction, this balaclava delivers warmth, breathability, and comfort when you need it most—whether you're skinning up a backcountry slope, running winter trails, or commuting through frigid mornings.

Built for Performance
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Merino Wool Construction - Natural temperature regulation keeps you warm without overheating during intense activity
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Seamless Design - Zero chafing or irritation, even during all-day wear under helmets or hoods
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Moisture-Wicking & Odor-Resistant - Stays fresh and dry through sweat-inducing efforts
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Streamlined Fit - Low-profile design layers easily under helmets, hoods, and goggles without bulk
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Full Face & Neck Coverage - Complete protection from wind, cold, and harsh elements
- One Size
The Details
Color: Ultra Violet | SKU: SW018152L46 | Weight: 14 oz | Made by Smartwool
From dawn patrol ski tours to winter bike commutes, the ISTO Balaclava delivers the versatile protection and comfort you need to stay outside longer.