I bought one of these bra's to see how it was and I was so surprised that they are so great, comfortable and I don't jingle at all doing high impact aerobics and jogging and I am not a small girl, 38D.  Hard to find a bra that will hold you. They wash very well also. I bought another one right after I bought my first one and now I am going to buy my third one. The straps do not have an adjustment but they are thick straps and DO NOT fall off my shoulders. They stay put. I would highly recommend.