First Ascent Heatshield Men's Base Layer uses Polartec Power Dry to pull moisture directly from the skin and transfer it to the outer surface, allowing it to quickly dissipate. The continuous evaporation process keeps you cool (when your body heat increases) and warm (when the temperature drops). The Heatshield vest is the ultimate cycling base-layer. Features:- Superior wicking and fast drying- Highly breathable- Lightweight and easy care fabric- Earphone loop- UPF50+ protection

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