Polartec® Delta™ is built for cooling without the compromise. Most wicking fabrics dry sweat so fast your body never benefits from its own perspiration. Delta takes the opposite approach, dispersing moisture across the fabric surface where airflow accelerates evaporation and carries heat with it. On the bike, that means no soggy cling on long climbs and no overheating when the pavement is radiating back at you. We develop products with Polartec® Delta™ because staying dry shouldn't mean staying hot.