Luxury bar soap revival: how Chanel, Jo Malone, Diptyque and Aesop elevated everyday cleansersFor most of the 2000s, the body wash industry did a convincing job of making bar soap feel like something only your grandfather used. Sleek bottles, foaming textures and a lot of vocabulary around “moisturising complex” pushed the bar quietly to the back of the shelf, where it sat next to nothing in particular. Then, sometime in the past few years, it had a glow-up.It wasn’t one thing that brought it back into the fray. The slow beauty and sustainability conversation started picking away at single-use plastic packaging and suddenly a paper-wrapped bar looked like the more considered choice. At the same time, the shower started being treated as a ritual rather than a chore, which meant everything in it became an opportunity for intention (and aesthetics).Chloé Atelier des Fleurs soap. Photo: HandoutWhich is probably why Chanel’s No 5 bath soap, a creamy bar scented with the floral notes of the iconic fragrance, now sits on bathroom shelves alongside things like candles and curated ceramics. Chloé’s Atelier des Fleurs line translates the maison’s single-note fragrances into logo-engraved bars finished with its signature pleating. And Claus Porto, the Portuguese house that’s been producing elaborately illustrated soaps since 1887, has made a collector’s item of its Deco collection slabs.Claus Porto soaps on a rope. Photo: HandoutBut the most interesting part of the bar soap story is what’s changed inside. Traditional bar soaps were alkaline, usually landing somewhere between pH 9 and 10, while your skin’s natural surface sits at a slightly acidic 4.5 to 5.5. “That alkalinity strips away the skin’s natural oils and disrupts the acid mantle, the protective film that keeps moisture in and irritants out, and it can take your skin hours to recover its natural balance afterward,” says John Blount, biochemist and president and CEO of Pure & Gentle. So that tight, dry feeling most people associate with bar soap was really the skin’s acid mantle struggling.Modern bars are engineered to a different standard. Blount points to three main advances in the best of them: gentler surfactants that lift dirt without over-stripping; barrier-supportive ingredients like ceramides, fatty acids and humectants including glycerine; and what formulators call deposition technology.Mutha Oil to Gel Cleanser soap. Photo: Handout“Smart ingredients cause a conditioning film to actually stick to your skin as you rinse, rather than washing straight down the drain,” he says. “Without that, adding moisturising ingredients to a rinse-off product is largely pointless.” Many of the better bars on the market now are what the industry calls syndet (synthetic detergent) bars: think of them as liquid body wash that’s had the water removed and been pressed into a bar, with the same pH balance and the same skin-friendly logic. Dove’s classic Sensitive Skin Beauty Bar is probably the most recognisable example, and it’s lasted this long for exactly the same reasons the format is having a moment now.Dove Beauty Bar. Photo: Handout