Glass hair how-to searches spike every time Fashion Week puts a liquid-shine finish next to deliberately undone texture—and London Fashion Week SS27 is staging exactly that duel. Rush Hair & Beauty’s September 2026 trend briefing flags ultra-straight, high-shine “glass hair” as a major carry-over from AW26 (notably Anna Cofone’s Chet Lo finish for Authentic Beauty Concept), while Marie Claire UK’s SS27 beauty moodboard from Carly Utting and Larry King sketches the opposing poles: hyper-real reflective “digital” skin and shine versus cooler, lived-in, imperfect hair. This is not another lip-gloss lid tutorial and not body blush; it is scalp-to-ends reflectivity you can recreate after the shows close.

Drapers, covering mid-week catwalks, already logged cascading wet-look hair at H&M’s Olympia presentation—romantic lace paired with liquid lengths that would not look out of place in a Pre-Raphaelite painting. Glass hair how-to is how you translate that runway wetness into a wearable, frizz-controlled finish without standing under a literal mist machine.

Glass hair how-to: what the finish actually is

Per Rush, glass hair is an ultra-straight, high-shine finish so sleek it looks almost liquid. It is sculptural rather than bouncy: light should travel in a continuous sheet down the hair shaft instead of scattering off frizz or broken ends. The same briefing predicts that polished, glossed finishes will sit beside weathered, undone texture this season—neither cancels the other. Simone Rocha’s AW26 wind-swept work by Anthony Turner and distressed fishtail braids at Naomi Hart are the counterweight; your glass hair how-to is the high-shine half of the conversation.

Marie Claire UK’s Nessa Humayun spoke to session artists ahead of SS27. MAC senior artist Carly Utting says she is “really interested in digital texture at the moment: the hyper-real, reflective finish you see in digital fantasy imagery, where skin and shine just look too perfect to be real”—and she wants to recreate that feeling physically. Hairstylist Larry King pushes the opposite mood: irregular waves, lived-in texture, statement cuts, “less perfect… Cooler, looser and with a slightly unkempt edge.” File both. Your glass hair night and your undone brunch braid can share one week.

At-home glass hair how-to (Rush-adapted, 15 minutes)

Start damp. Apply a lightweight smoothing serum from mid-lengths to ends before blow-drying (Rush’s step one).

Heat protect. Use a strong protectant; glass hair is a heat-assisted finish, not a air-dry miracle.

Blow-dry with a paddle brush. Follow the hair’s natural direction; avoid creating random texture you will later fight with the iron.

Flat iron in small sections. Rush advises small sections for a sleek, mirror-like finish—large chunks leave ridges that kill the glass effect.

Decide the silhouette. Low smooth ponytail or loose lengths; both work if the surface is sealed.

Glossing oil, downward only. Finish with a glossing oil applied in a downward motion so light reflects cleanly along the hair.

Frizz insurance. If you are frizz-prone, Rush recommends a smoothing treatment beforehand; fine hair may need less product, not more.

Flash check. Phone torch at a side angle; if you see fuzz halos, re-iron the halo zone and re-gloss sparingly.

Product-agnostic checklist (no hard sell)

One smoothing serum for damp prep.

One heat protectant rated for flat-iron temperatures.

One paddle brush or equivalent tension brush for blow-dry.

One flat iron with clean plates—product residue kills glass.

One glossing oil or serum for the final downward pass.

Optional: silk scarf for commute; humidity is the enemy of liquid shine.

Not this look: skip sea-salt spray and matte clay on glass-hair days—those belong to the lived-in counter-trend.

Lived-in texture: the equal and opposite brief

Rush’s second pillar—weathered, undone texture—uses texturising sea-salt spray or matte clay through mid-lengths. Larry King’s Marie Claire notes point to Corinne Day–era realism, Reality Bites / Trainspotting attitude, and cuts that matter as much as styling. If glass hair how-to is about sealing the cuticle into a mirror, lived-in hair is about controlled imperfection. Many editors will shoot both in the same street-style gallery outside the shows.

Sam McKnight, also in the Marie Claire moodboard, expects “more texture” this season while still leaning into a luxe, healthy finish with movement. That sentence is your permission structure: healthy shine can coexist with softness; glass hair is simply the extreme polish end of the same continuum.

Where glass hair meets LFW SS27 culture

H&M’s wet-look lengths (Drapers), Susan Fang’s high-shine-versus-braid contrast via Anna Cofone (TheIndustry.fashion / prior Cover Issue culture coverage), and Rush’s Chet Lo AW26 reference together sketch a London that refuses a single beauty monoculture. Pair this glass hair how-to with our earlier Lip Gloss Lids and Body Blush primers when you want a full reflective beauty story—eyes, hair, or décolletage—without repeating the same technique twice.

Wear it this week without looking costume

Office translation: serum + five flat-iron sections + tiny oil. Skip the poker-straight waist-length drama if your cut is a bob—glass works on short lengths too.

After-party: convert glass lengths into a low sleek pony; add a single statement earring so the shine has a focal rival.

Next-day reset: do not re-wash into frizz; refresh with a tiny oil on mid-lengths only.

If humidity wins: switch to Larry King’s lived-in brief instead of fighting physics.

Glass hair how-to is simply light management. Seal the shaft, iron in small sections, gloss downward, and let LFW’s undone textures own the days you want grit. Liquid shine is a tool, not a personality transplant—and London this week is proof you can choose either finish without apology.