No bouncing with this bra designed specially for bigger cup sizes. Zip & go with an easy zip closure on the front. This bra gives you maximum support during intense workouts. The broad straps reduce pressure on your shoulders. The stitching not only looks attractive, but also reinforces the fabric. This bra is suitable for large breasts during high-impact activities. The zip has an auto-lock function. This auto-lock works when the zip is fully closed and prevents the lip of the zip falling downwards. So, the zip on the bra will not open.