Support Factor Rating: Medium Ideal for medium-impact activities such as walking, cycling, weight training. In Support of Freedom. Features and Benefits Perfect for cycling, walking, volley ball and weight training. SF: Medium impact | Support Factor 2 Ventilation zones and use of breathable fabric delivers cool comfort. Cross over straps give flexibility during your workout. Reinforced cup side panels support and shape the bust. Padded straps sit firmly on your shoulders.