Prohall Select One
★ Thermal Repair
Thermal Repair · One-Step Smoothing

Select One

A one-step, formaldehyde-free volume reducer that repairs the fiber from the inside out — soft, silky, frizz-free hair that keeps its natural movement.

★★★★★4.8 Loved by thousands
$80.00 One-step thermal repair

or 4× $20.00 interest-free

In stock · Ships in 1–2 business days
Pay in 4 interest-free — Shop Pay Klarna
Free shipping on orders over $50
Cruelty-free — never tested on animals
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Why you'll love it

The Benefits, at a Glance

One step, salon-grade results — here's what Select One does for your hair.

The benefits at a glance — Select One: frizz & volume down, soft silky touch, movement kept (not pin-straight), repairs the fiber from within, radiant shine, and long-lasting results.
Why you'll love Select One — repairs the hair fiber from within; one step, no kit needed; formaldehyde-free formula; long-lasting results.

What's Inside

A nutrient-rich blend that rebuilds the fiber and locks in softness — without formaldehyde.

Select One active ingredients — Coconut Oil tames frizz and seals split ends; Argan Oil adds shine and softness; Hydrolyzed Collagen restores elasticity and rebuilds the fiber; Lactic Acid smooths the cuticle.
Active · 01

Coconut Oil

Antioxidant protection — guards against breakage, tames flyaways and seals split ends.

Active · 02

Argan Oil

Adds shine, strength and a protective veil to every strand.

Active · 03

Hydrolyzed Collagen

Restores elasticity and movement, rebuilds fiber damaged by chemical services, and locks in moisture.

Active · 04

Lactic Acid

Smooths the cuticle and helps the actives absorb for a sleek, lasting finish.

At a glance

Features

  • One-step — no kit, no mixing
  • Formaldehyde-free formula
  • Thermal repair & smoothing
  • All hair types, including color-treated
  • Coconut + Argan oils · Hydrolyzed Collagen · Lactic Acid
  • Low odor — no harsh fumes
  • Cruelty-free & vegan-friendly
  • Keeps your natural texture
Performance

Proven on Real Hair

Smoother, shinier, more disciplined hair — from a single one-step treatment.

97%
saw less frizz*
9×
more shine*
0%
formaldehyde

*Placeholder figures — replace with your verified test data.

The Pro Protocol — five steps to smooth: 1. Cleanse, 2. Apply, 3. Process, 4. Blow-dry and iron, 5. Seal. Always start with an allergy and strand test.
1

Cleanse

Wash with the purifying shampoo to prep the fiber, then towel-dry.

2

Apply

On clean hair, apply Select One strand by strand, 1 cm from the scalp; comb through.

3

Process

Leave on 1–1.5 hours by hair type, then rinse 100% with water only.

4

Blow-dry & iron

Dry, then flat-iron thin sections 10–15× at ≤180°C for a satin finish.

5

Seal

Re-wet and finish with the Equalize Mask to stabilize and lock the result.

Real results

Your Best Hair, Bottled

See the one-step transformation in motion.

“Frizz-free, glossy hair that lasts for weeks.”
Find your match

Not Sure Where to Start?

Tell us your goal — we'll point you to the right treatment.

Select One is your match — a lighter, one-step thermal repair that smooths and de-frizzes while keeping your natural movement.

Loved by thousands

What Customers Say

4.8
★★★★★
out of 5 · 1,204 reviews
5★82%
4★12%
3★4%
2★1%
1★1%
Select One customer result
Select One customer result
Select One customer result
Select One customer result
Select One customer result
★★★★★
May 18, 2026

Frizz gone, movement stayed

Smooth and silky but my hair still has body — exactly what I wanted, not pin-straight.

Carla R.Verified Buyer
★★★★★
May 3, 2026

So easy — one step

No mixing, no kit. One product and the frizz is gone for weeks.

Daniela P.Verified Buyer
★★★★★
Apr 27, 2026

Salon result at home

Sleek, shiny, and my color looks completely untouched.

Renata L.Verified Buyer
The details

Product Details

What it is
A one-step, formaldehyde-free volume reducer and thermal-repair smoothing treatment. It works inside the fiber — repairing strands from within, improving nutrient absorption and restructuring the hair — for soft, silky, frizz-free results that keep their natural movement.
How it works
A nutrient-rich blend penetrates the cortex to rebuild and realign the fiber while improving how it absorbs nutrients, so volume and frizz drop in a single step — without harsh, pin-straight straightening.
Key actives
Coconut Oil — antioxidant protection that guards against breakage, controls frizz and seals split ends.
Argan Oil — adds shine, strength and a protective veil to every strand.
Hydrolyzed Collagen — restores elasticity and movement, rebuilds fiber damaged by chemical services and locks in moisture.
Lactic Acid — smooths the cuticle and helps the actives absorb for a sleek, lasting finish.
How to use
Always begin with an allergy & strand test.
1 · Clarify with the Purifying Shampoo and rinse.
2 · On clean hair, apply Select One strand by strand and comb through.
3 · Leave on 1–1.5 hours depending on hair type, then rinse 100% with water only — no residue.
4 · Split into four sections, comb thin strands and flat-iron 10–15× at ≤180 °C for a satin shine.
5 · Seal with a blow-dry, then finish with the Equalize Mask to stabilise and boost the result.
Who it's for & specs
Suitable for all hair types, including chemically treated and colour-treated hair. Formaldehyde-free, low-odour, vegan and cruelty-free — for professional or at-home use.
Caution
For external use only. Keep out of reach of children and away from heat and light. Avoid contact with the eyes — if it happens, rinse thoroughly with water. Discontinue use if irritation occurs.
Good to know

FAQ

Will it make my hair pin-straight?
No — Select One reduces volume and frizz while keeping your natural movement. For a stronger straightening result, choose Miracle Therapy.
Is it formaldehyde-free?
Yes, completely — low odor and no harsh fumes, so no special ventilation is needed.
How long does it last?
Typically several weeks; results build with regular use and sulfate-free aftercare.
How is it different from Miracle Therapy?
Select One is a lighter, one-step thermal repair that smooths and de-frizzes. Miracle Therapy is a stronger 3-step keratin smoothing system.
$80.00
Select One
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