My wife has a D size cup and has been very unhappy in general with the support that sports bras have provided her in the past.  She really wanted to work out with more impact but could not without additional support.  This one fit the bill.  It supports her incredibly well.  The bra is constructed of two layers with one supporting the other.  The design is simple, but perfectly addresses the support issues not address by practically any other sports bra: one layer to  provide support.

Bravo - good product that she will purchase momre of now that I took the leap and bought the first.  WORTH THE MONEY!