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8 Long-Sleeve UA Tops to Keep You Warm During Your Next Trail Ride
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HeatGear® Armour Long Sleeve

Never underestimate the power of a solid and reliable base layer. The HeatGear® Armour Long Sleeve ($33) is just that thanks to it's chafe-free fit, ventilated pinhole mesh, and of course, breathable HeatGear® technology.

HeatGear® Armour Long Sleeve
HeatGear® Armour Long Sleeve
$33
from underarmour.com
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