It * does * need an old school full slip underneath as the brushed cotton fabric is going to really stick to tights once it gets a little colder. (fashionschlub.com)
White dresses can be tricky, so DO go for a lightweight body shaper; such as the Comfort Devotion Smooth Body Full Slip in nude. (verybusymamablog.com)
I have a half slip which was just the perfect length for this skirt and also own a few full slips that I usually wear with dresses. (xobeverly.com)