Guide · 4 min read

S-curl perm: loose waves through the lengths

Zoltan Vargyai · permingUP since 1991
Updated 29 September 2026

The short answer

An S-curl permUP gives loose, soft waves that run down the lengths in an S shape. It’s the relaxed, lived-in wave: more movement than a C-curl, softer than a proper curl.

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What it looks like

Waves that bend one way, then the other, down the length of the hair. The root usually stays flat or only lightly lifted.

How it’s done

The lengths are wound on medium to large rods and processed, often as a heat permUP so the wave comes out clean and shiny when dry. The size of the rod decides how tight the S is.

Who it suits

Straight or slightly wavy hair from the shoulders down, that has enough strength to take a permUP. It suits people who want to air-dry and go.

What to expect

A heat permUP looks its best dry and looser wet. The first week it will be at its tightest; it relaxes into its real shape after a few washes.

How it grows out

Softly. Because the wave is in the lengths, there’s no hard line at the root.

“the digital perm from “hair texturiser” to the stars, Zoltan”

The Times online, August 2016 Read →

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Want this done properly?

In my chair it's called WavementUP.

Curl built for your hair, 6+ months. Cold £299.95–£499.95 · Hot £389.95–£659.95, by length.

See WavementUP →

Are you a pro? The full technique is on tecSture. tecsture.com →

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