I purchased this bra after being fitted by a professional at a bra shop. I purchased a 40 F. This bra is awesome. It is the first sports bra I have ever owned that has allowed me to run comfortably. I have very little bounce, nothing that is bothersome.  I couldn't believe how great the support is. I've never been able to stick with running until I purchased this bra and now I've been running 2+ miles every day. What a difference! The bra shop recommended using Forever New detergent to wash this bra and to air dry it. It has held up wonderfully and besides some sweat stains, the fabric does not show any wear after about 3 and a half months of basically daily use.