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Shop Merchants:

Cool comfort and sleek style come together in the adidas Supernova long-sleeve top unique ''burn-out'' application aids microventilation.

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Brisk mornings and cool evenings shouldn't deter you from your workout schedule the Frankie Run long-sleeve shirt wards off the chill.

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The ASICS Thermopolis LT zip-neck top has a ''cashmere-like'' feel and the midweight fabric renders it a great first or single layer for fall and winter running.

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The ASICS Thermopolis WP top is windproof and lightweight. You might even enjoy those foul-weather workouts!

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Superbly soft, the long-sleeve Equilibrium top from Brooks is a base layer that ensures dry comfort on the run.

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The Brooks Vapor-Dry 3D moisture-transfer, mid layer top is anatomically shaped to move with you while you run and offers great thermal regulation in high heat/sweat areas.

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Whether racing against yourself or others, the Circuit long-sleeve T-shirt from New Balance will keep you cool, dry and comfortable.

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The New Balance Competitor cold-weather top provides thermal compression, mesh breathability and 360 visibility.

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You'll stay warm, but you won't overheat in the Cold Weather half-zip top from Nike.

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Think of the Nike Pro Core fitted long-sleeve crew as first-layer equipment.

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