Reduces breast bounce by up to 50%. Our most popular sports underwire bra, is a high impact bra designed with fun vibrant contrast colours for a supportive workout. Mesh in the cup and back provides breathable panels for a cooler workout. Style: Y556W Berlei Support Factor 3 - High Impact. Reduces breast bounce by up to 50%. Our most popular sports underwire bra, is a high impact bra designed with fun vibrant contrast colours for a supportive workout. Mesh in the cup and back provides breathable panels for a cooler workout. Cotton lined cups provide added comfort during exercise. Cross over straps deliver additional support and versatility under clothing. Style: Y556W