This is a fantastic bra.  I was a bit skeptical on the keeping you "cool" claim, as I live in Arizona and it's about 1000 degrees 11 months out of the year.  However, when I put the bra on, it felt cool and EXTREMELY comfortable.  Great fit, very smooth, fantastic fabric, and it DEFINITELY smooths the back and sides.  No digging in, fantastic support, and I really can't tell I have it on.  I ordered one in black and just ordered another one in nude to wear under white clothing.  You can't go wrong with this product, I couldn't be more pleased with my purchase.