What is a 'built-in petticoat'?

What is a 'built-in petticoat'?

Sally Grigsby (Owner of Belle Bridal) gives expert video advice on: What are 'finished seams'?; What is a 'built-in crinoline'?; What is a 'true-crinoline'? and more...

A built-in petticoat can vary enormously in size. It will either hold the gown out a little bit at the hem if it's a mermaid, or it will hold it out more if it's a fuller A-line or ball gown.