The material is a rayon that looks like a casual cotton.  It is great for the beach or a tropical vacation. This would look great with sandals or as a swimsuit cover up.  The body of the romper is lined.  This romper is lightweight and fits great. 
 
Laid flat measurements:
17.5 in across the chest
32.5 in from top of the shoulder to the bottom hemline
14.5 inches across the waist 
13 in rise 
2.5 in inseam