I already knew that it's not the lightest summer dress by reading previous reviews.
yes, it is fully lined with stretchy fabric which is kind of thick and heavy for skinny straps. i still love this dress it's very beautiful and versatile. it's perfect for san francisco summer it never gets too hot anyway. 
the color is also beautiful but it's little pink side of red.
i am 5'4 size 0 it fits perfect just like the picture.