What mesh replaced
A coil is the part that heats e-liquid into vapour. The original design was literally a coil — a wire wound into a spring, wrapped around a wick. It works, and it has one structural problem: a wound wire is thin and concentrated, so it heats unevenly, with hot spots along the wire and cool gaps between the turns.
Mesh replaces the wire with a flat perforated strip — think fine metal gauze. Same job, far more surface area touching the wick, spread evenly instead of concentrated in a spiral.
That's the whole innovation. More even contact, more even heat.
Why it took over
The honest framing: mesh isn't a marketing word bolted onto an unchanged part. It's a real design change that measurably improved the thing it replaced, which is why it went from premium feature to nearly-universal default in a few years. Most devices on this site use dual mesh; the RAZ TN9000 lists mesh.
- Even heating means no hot spots, and hot spots are what scorch liquid and produce that sharp, burnt edge.
- More surface area means more vapour at the same power, so a device can run cooler for the same result.
- Faster warm-up — the strip reaches temperature quicker than a wound wire, so the first draw is closer to the fifth.
- More consistent flavour deeper into the device's life, which is what the Meloso MINI's spec sheet is claiming when it says the coil keeps flavour consistent down to the last puff.
So what does the "dual" add?
Two mesh coils instead of one. More total heating surface, which supports higher-power modes without pushing either coil past what it can handle cleanly.
That's why dual mesh shows up alongside the boost modes. The Geek Bar Pulse 2's Pulse mode leans on having two coils to spread the load — a single coil driven that hard is exactly where the burnt taste comes from.
On a small device it does less. The Meloso MINI is dual mesh too, and at 5mL with no high-power mode it's more about even flavour than about surviving abuse.
Does it change what you should buy?
Not as a first filter. Most devices we stock are dual mesh; the RAZ TN9000 lists mesh, without the dual. Coil type is useful as context, and as a signal when something elsewhere doesn't mention mesh at all.
Where it does earn attention: if you're comparing against something elsewhere that doesn't say mesh, that's a meaningful omission worth asking about. And if a mesh device tastes burnt, the coil is telling you the liquid feeding it has run out — that's a dry coil, not a defect, and no amount of mesh fixes it.
If you want a spec that actually separates the devices on this shelf, use e-liquid capacity in millilitres.
Common questions
What is a dual mesh coil?
Two mesh coils in one device. A mesh coil is a flat perforated metal strip that heats e-liquid, replacing the older wound-wire design; doubling it adds heating surface, which is what lets a device run a high-power mode without scorching. Most devices we stock use dual mesh; the RAZ TN9000 lists mesh.
Is a mesh coil better than a regular coil?
For this job, yes, and it's not really contested — that's why it became universal. A flat mesh strip contacts the wick more evenly than a wound wire, so it heats without hot spots, produces more vapour at the same power, and warms up faster. The old design's hot spots were what caused scorched, sharp-tasting liquid.
Does dual mesh make the flavour better?
More consistent, which usually reads as better — even heating avoids the scorched edge that comes from hot spots on a wound wire, and it holds up deeper into the device's life. It won't rescue a flavour you don't like, and it won't rescue a device that's out of liquid.
Should I choose a vape based on the coil?
Not as the first filter — most devices we stock are dual mesh, and the RAZ TN9000 lists mesh. Compare e-liquid capacity in millilitres instead. Coil type becomes a useful signal when something you're considering elsewhere doesn't mention mesh at all.
