Craft Bike Tech Jacket Softshell fabric is high denier knit that's fully weatherproof, plus it's soft, smooth and highly elastic ThermoCool fabric is a lightweight, soft polyester with superb thermoregulation and high elasticity, plus its hexa-channel fiber interior provides efficient moisture transport 4-way elasticity for optimal freedom of movement Laser-cut ventilation in hot spots promotes strategic airflow Form fit improves aerodynamics