This Free People best seller is in a soft cotton fabric and is a relaxed fit.

It features spaghetti straps (non-adjustable, but stretchy), a dropped crotch and side pockets for convenience. The Onsie is meant to be loose and oversized for layering. Layer this 95% cotton 5% elastane jumpsuit with long sleeves in the winter or a tank / bandeau in the summer. A very versatile piece!