As is usually true with a Playtex 18-hr bra, this bra is comfortable, true to size, uplifting, and cool. Honestly, I didn't notice any posture difference but then perhaps my posture is o.k. to begin with. The shoulder straps are wide enough that they don't cut into my shoulders. The shoulder strap adjustments are hooks rather than the sliding type adjustments - they stay adjusted. I would buy another bra like this one and I would recommend this bra to my friends and relatives.