Foil highlights are one of the most classic and precise ways to lighten hair selectively. The stylist uses a tail comb to part fine sections, «weaves» out individual strands and applies bleach or a lightening colour to them. Each strand is then folded into a piece of aluminium foil. The foil keeps the product on the strand, stops it from touching the neighbouring hair and traps heat – which speeds up and intensifies the lift. This is exactly why foils let you work much closer to the root and achieve a brighter, more even result than freehand techniques.
The key difference from balayage or ombré: with foil highlights the product is applied from the root down through the lengths and develops in isolation, giving a continuous, «gap-free» highlight. Balayage, by contrast, is painted on freehand and usually develops in the open air without foil, creating a soft, blended transition with the root left out. Foil highlights therefore look more defined, brighter and more brilliant – ideal if you want a real light-dark contrast, more brightness around the face or an even blonde base. By varying the density of the foils (many fine strands vs. a few thick ones), the stylist controls how subtle or bold the outcome will be.
Foil highlights suit almost every hair type and starting colour – from dark blonde through brown to previously coloured hair. They are also a popular way to visually disguise the first grey hairs, because the light strands soften the contrast with the grey. On very dark or heavily pre-coloured hair, several sessions may be needed depending on the desired shade to reach a cool, clean blonde without a yellow cast. How long the treatment takes depends on hair length, thickness and the number of foils: a half head takes roughly 1.5 to 2 hours, while a full head of foils including washing, toner and blow-dry often runs 2.5 to 3.5 hours.
When it comes to longevity, the root is the deciding factor. Because foil highlights start at the root, the regrowth becomes visible after about 6 to 10 weeks; most stylists recommend refreshing the highlights every 8 to 12 weeks, with a toner-only refresh possible in between. Aftercare includes a silver (purple) shampoo to fight brassiness, moisturising treatments, heat protection when blow-drying and straightening, and as little hot styling as possible, since lightened hair is more porous and fragile. Good UV and chlorine protection in summer keeps the blonde looking clear for longer.
In terms of price, foil highlights vary widely across Switzerland depending on region, salon level, hair length and effort. As a rough guide (no guarantee), half-head foils typically cost around CHF 120–200, while a full head of foils including toner and often a cut/blow-dry runs around CHF 180–350 or more. Very long or dense hair, multiple bleaching passes and premium salons can be considerably higher. Because the range is so broad, comparing prices pays off – on CityHero you can put local salon offers and reference prices for foil highlights in your city side by side.