This dress is cool and even thought the fabric is soft and thin it is not see thru.  The small/medium fit me perfectly and I am 5'6'' tall and weight about 135 pounds. I washed in cold water on the delicate cycle and hung to dry and it did not need to be ironed.  It seems to slenderize.  This dress is so comfortable, I ordered the steel blue and red.  They are lovely too.  The red is  a subdued red with black accents accomplished through the embroidery.