You are checking out a great romper from She + Sky.  You can wear this casually during the summer with sandals.  The material does not any stretch but is loose and flowy and has a zipper in the back. The romper is fully lined in a soft silky polyester.  
 
Laid flat measurements:
17 in across the chest
13.5 in across the waist 
13.5 in rise
2 1/4 inseam