evo.com | Smartwool Balaclavas > Cold face? Covered. The Smartwool Active Fleece Balaclava brings soft Merino-blend comfort to the days when the wind has other plans. Four-way stretch keeps it moving with you, while reflective details add a little extra visibility for early starts, late laps, and everything in between. One Size Fits Most Reflective Elements Four-Way Stretch Main 54% Polyester / 38% Merino Wool / 8% Elastane Trim 56% Merino Wool / 44% Polyester | Smartwool Active Fleece Balaclava 2027 in Black | Wool/Elastane/Polyester