The "This is not a Bra" bra uses the "Satin Comfort Underwire System" The wire is covered in satin padding to keep it from digging in. You get the support and shaping of an underwire bra with the comfort of wire-free. Love it. Another thing that definitely adds to the comfort is the silky-soft feeling fabric that this bra is made of.
It has molded cups with light graduated foam padding. It has seamless cups so it looks smooth under clothing and is great to wear with a t-shirt or tank top. The Warner's site shows black, almond, and white. However, online I did find some other trendy color choices.
Overall, I'm very happy with the "This is Not a Bra" and I'm looking forward to trying the This is Not a Bra™ Customized Lift Underwire bra which has the same Comfort Wire System, but has some pretty lace details.
You can find more information on the Warner's website or connect with them on facebook or twitter.