I wear slips with almost every skirt and dress. I don't with self-lined items, and occasionally I leave it off with snug sweater dresses that I wear with Wolford tights, which are smooth like dance tights and don't get static.
Most of my half slips are Vanity Fair, which I get from Kohl's. Others are from the department store Dillard's. Their store brand Cabernet has the best selection of both traditional full and longer slips; it's hard to find a slip nowadays without a slit to mid-thigh, but they do have at least one. I think they discontinued the shorter ones. I have a big collection of both black and nude half slips in different lengths, depending on the color of the skirt/dress and legwear. I wear the 16" black one quite a bit in winter because it keeps short dresses/tunics from riding up on leggings and thick tights.