With decent styling, don't be afraid to wear this alone in the fall and spring for jogging and cycling.The ec2 fabric uses electrostatic evaporation instead of standard wicking to release moisture and excessive heat. Standard wicking relies on contact between the skin and the fabric, so the garment needs to be skin tight. The ec2 allows the wearer to have a looser fitting garment for maximum comfort without loosing the ability to thermoregulate.