A slip skirt is effortless in a way that very few garments achieve. The bias cut, the satin or silk-like fabric, the way it moves against the body. With a simple tee and trainers it looks deliberately cool. With heeled boots and a knit it goes somewhere more evening appropriate. The slip skirt works across an enormous range of contexts and that versatility is genuinely rare. These are the ones we keep reaching for. The versions with the right weight and the right cut to really work rather than just approximate the look.