So cute! Vintage Baby Summer Bib Bloomer Romper Overalls Sailing Theme Seersucker S (9-12 mo)
Tag is very faded and hard to read.  Feels like all cotton.  Embroidered Salboat sun and cloud, tie waist. 
Open top,Gathered elastic legs.
Measures:  9" across waist laid flat, tie adjust. Pre-Owned, nice condition.
Total length to waist: 7.5"
Total length to bottom: 17.5"