TechRadar Verdict

The T3 SinglePass Smooth X looks great while being highly practical.

This also helps create more uniform curls that last.

It’s only available in the US, and is only sold in a single Satin Blush color.

T3 SinglePass Smooth X flat irons, photographed side-on, on reviewer’s marble dressing table

Its price and technology positions the SinglePass Smooth X in the mid-range of T3’s wider straightener lineup.

The closest model to the Smooth X is theT3 SinglePass Stylemax.

Largely because of its built-in tech, and design as well as its performance.

Close up of ceramic straightening plate on T3 SinglePass Smooth X flat iron

These plates also use a so-called StyleEdge design.

It weighs 14.7 oz / 417g.

I found the straightener to be well-balanced.

Close up of power switch T3 SinglePass Smooth X flat irons

It isnt too heavy, but it has enough weight to feel sturdy and comfortable.

This all adds to the premium feel.

That said, T3 does suggest dropping the temperature down 1-2 tweaks if your hair color-treated.

T3 SinglePass Smooth X straighteners, viewed from above, on reviewer’s marble dressing table

The Smooth X will then remember your chosen setting for the next time you use it.

A small downside is that the position of the power button makes it easy to accidentally change temperature mid-style.

However, I welcomed the ability to drop or increase the heat as and when needed.

Reviewer holding T3 SinglePass Smooth X flat irons with a turquoise background

This technology uses a microchip that continuously monitors the temperature, preventing hot or cool spots.

This not only saves time but helps reduce heat damage.

These heaters work in tandem with the ceramic plates and SinglePass tech to keep an optimal and steady temperature.

T3 SinglePass Smooth X…

Sadly I was underwhelmed with how my hair looked after being straightened.

As my hair is naturally curly, I usually only use a flat iron to knock out this frizz.

This was the case with the Smooth X, unfortunately.

Prime

It almost straightened my hair into submission and there was very little movement.

Plus, moving the tool around my head was always comfortable, no matter which style I created.

I didnt experience this myself during my review, but its something to keep in mind for long-term use.

T3 SinglePass Smooth X…

Should I buy the T3 SinglePass Smooth X?

It’s also not dual-voltage, which can be limiting for international travel.

I timed how long the styles took to complete and monitored the finish and condition of my hair.

Nordstrom

First reviewed: September 2024

T3 SinglePass Smooth X…

Macy’s

T3 SinglePass Smooth X…

SINGLEPASS SMOOTH X

T3 Micro