The difference is the back panel. A wide W-shaped section crosses your upper back and draws your shoulders into place, rather than a thin strap sewn onto an ordinary bra. It's a steady, comfortable pull — you stop rounding forward without having to think about it.

It's the easiest part. Slip it over your head like a tank top, reach back and bring the two wide straps forward around your ribs, then hook the closure in front where you can see it. About ten seconds, no reaching behind your back.

No. Molded cups and seamless, flat edges keep it smooth under fitted tops. Black works under dark clothing, Nude under everything else — which is why most people keep one of each.

Sizing runs off your under-bust measurement. Stand straight and wrap a soft tape horizontally just below your chest, without a bra on, then match that number to the size chart. Between sizes or fuller bust? Size up. A size chart is also provided in the second image.

That's what it's built for. It's completely wire-free with soft, flat edges, so nothing pokes or digs in over a nine-hour stretch. Wash cold in a mesh bag and air dry to keep the back panel's shape.