What is a slip dress?

What makes it a slip

Three things: thin straps, a silky fabric and a bias cut. Cutting on the bias means cutting along a line running diagonally across the grain, at 45 degrees to the edge of the fabric (Merriam-Webster). The V&A explains that a Paris couture house made the bias cut famous in the early 1920s, with dresses that "clung naturally to the body" without a corset. That's why a slip skims rather than grips.

Fabric matters too. Satin is a weave with a "lustrous face and dull back" (Merriam-Webster), so satin can be silk or a synthetic. MoMA lists silk, charmeuse and linen as typical slip fabrics, and notes slips are always sleeveless and come in any length, mini to maxi.

From underwear to outerwear

The slip started life under your clothes. Qantas Travel Insider says slips were traditionally cut on the diagonal, with thin straps, and were rarely worn on their own until the 1990s. MoMA traces the term to Vogue in 1934, and points to a spring/summer 1994 runway show that captured the minimalism of the decade. Who What Wear calls the slip "the feminine answer" to an era that ditched the shoulder pads of the 80s, and History.com lists "body-skimming bias cuts" among the clean shapes that defined 90s American minimalism.

Day vs night

• Day: layer it over a white tee, a trick Who What Wear suggests when spaghetti straps feel a bit exposing. Add trainers or flat sandals.
• Work or cooler days: a fine knit or a crisp shirt under or over it, plus a blazer.
• Night: heels, simple jewellery and a leather jacket or blazer. MasterClass pairs a satin slip with a leather jacket for date night.
• Weddings: MasterClass suggests a midi or maxi slip for a formal wedding. Check the dress code, and bring a wrap for the ceremony.

Bra and fabric notes

Thin straps and shiny fabric show everything. Try a strapless or convertible bra, adhesive cups, or a slip with a built-in lining. Seamless, skin-tone underwear beats lace under satin. If you want a bra on show, make it look intentional, like a tee or bralette layered under. Satin and silk crease and water-mark, so steam rather than iron, and keep drinks steady.

In Australia vs the US: a slip on its own suits Australian summer, December to February (Bureau of Meteorology). In the US that's June to August (NOAA). In winter, layer it with knits and boots.