How to Choose
The right weft is the one you forget is there.
One injected construction. Your ALIO Accredited Installer guides weight, length and row placement at your consultation — every head is different., three lengths. Your ALIO-certified stylist makes the final call — this guide helps you walk in knowing what to ask for.
Weft Guide
Find Your Weft.
Five questions. One recommendation — construction, weight and length.
Your hair
How would you describe your natural hair density?
Sensitive scalp?
Start here.
Every ALIO AERA weft uses a medical-grade polyurethane (PU) base — hypoallergenic, latex-free, designed for prolonged skin contact without irritation. If you have a sensitive scalp, a skin condition, or simply react to most extension materials — this is why ALIO exists.
Weft Constructions
One construction. Injected II/II.
Injected II/II
One construction. Completely flat. Completely hidden.
Both sides injected invisible — no visible track from any angle, even tied up. Placement can be horizontal or diagonal depending on your head shape and hairline. Your ALIO Accredited Installer decides the layout at your consultation.
The Bun Test
Bun without a track.
The Injected II/II weft installed correctly gives you a clean bun, slicked ponytail or updo with no visible track. The same install. Full glam for Saturday night. No adjustment required.
Weight Guide
How much hair do you need?
100g
Finer hair
The right starting weight for finer hair or first-time clients. Your ALIO Accredited Installer will advise.
140g — most popular
Most hair types
The most popular weight across all hair types. The starting point your installer will most likely recommend.
160g
Thicker or denser hair
For thicker hair or a more voluminous result. Your ALIO Accredited Installer will determine what is right for your hair and head shape.
Length Guide
How long do you want to go?
18" (46cm)
Just below the shoulder
Natural everyday length. Works beautifully for bun styling.
20" (51cm) — most popular
Mid-back
The most popular length. Enough for a full blowout without being unmanageable.
22" (56cm)
Lower back — full glam
A full, dramatic result. For clients who want the full experience.
Still Not Sure?
Find your shade first.
Build Your ALIO Kit — three real swatches couriered to your door — or find a ALIO Accredited Installer who can guide you through both shade and weft selection in person.