MTL, DTL & RDL Vaping Styles Explained

October 2, 2025 By: Dan Judd

MTL, DTL and RDL describe three common ways of inhaling vapour. Mouth-to-Lung (MTL) draws vapour into the mouth before it is inhaled, Direct-to-Lung (DTL) draws it straight into the lungs, while Restricted Direct-to-Lung (RDL, also called RDTL) uses a direct inhale with a more restricted airflow.

The vaping style a device is designed for can influence the airflow, power level, vapour output and type of e-liquid that works best with it. Understanding the differences between MTL, DTL and RDL makes it easier to choose a vape kit and setup that suits the kind of draw you prefer.

MTL vs DTL vs RDL: What’s the Difference?

The main difference between MTL, DTL and RDL vaping is how the vapour is inhaled and how open the airflow feels.

MTL uses a two-stage inhale: vapour is drawn into the mouth first and then inhaled into the lungs. It usually has the tightest airflow and lower vapour output of the three styles.

DTL uses a single, direct inhale into the lungs. It generally uses a more open airflow and higher-output setup, producing a larger volume of vapour.

RDL, or RDTL, also uses a direct-to-lung inhale but with more airflow restriction than a typical DTL setup. It sits between MTL and DTL in terms of draw and vapour output.

The device, airflow setting, coil or pod and power level all contribute to how each style feels, so resistance alone should not be used to define whether a setup is MTL, RDL or DTL.

What Is Mouth-to-Lung (MTL) Vaping?

Mouth-to-lung (MTL) vaping uses a two-stage inhale. Vapour is first drawn into the mouth and then inhaled into the lungs, creating a tighter, more restricted draw than RDL or DTL vaping.

MTL setups usually operate at lower power and produce less vapour per puff than higher-output DTL setups. They are commonly used with pod kits, vape pens and other devices designed for a restricted airflow, and the draw can feel familiar to people who have previously smoked cigarettes.

The exact experience still depends on the device, airflow, coil or pod, nicotine strength and e-liquid used, so MTL should be understood as a style of inhale rather than a specific resistance or device type.

If you prefer this style of draw, you can compare our range of MTL vape kits.

What Is Direct-to-Lung (DTL) Vaping?

Direct-to-lung (DTL) vaping uses a single inhale, drawing vapour directly into the lungs rather than holding it in the mouth first. It typically uses a more open airflow than MTL or RDL vaping and is designed to produce a larger volume of vapour with each puff.

DTL setups commonly operate at higher power and often use lower-resistance coils than MTL devices, although resistance alone does not define the vaping style. Airflow, coil design, recommended wattage and the device itself all play a part.

Because higher-output DTL setups vaporise more e-liquid per puff, they are commonly paired with high-VG e-liquids and lower nicotine strengths than those typically used for MTL vaping.

If you prefer a more open, higher-output draw, you can explore our sub-ohm vape kits.

Restricted Direct to Lung Vaping: The Middle Ground

Restricted direct-to-lung (RDL), also called RDTL, uses a direct inhale into the lungs like DTL vaping, but with a more restricted airflow. The draw therefore feels tighter than a typical DTL setup while remaining more open than most MTL devices.

RDL setups often sit between MTL and DTL in terms of airflow, power and vapour output, but there is no single resistance or wattage that defines the style. Many modern pod kits can support RDL vaping through adjustable airflow and a choice of compatible pods or coils.

RDL can suit people who want a more open draw and greater vapour production than MTL without moving to the airflow and output of a typical DTL setup.

Benefits and Considerations of MTL Vaping

MTL vaping generally produces less vapour and uses less e-liquid than higher-output DTL setups. The tighter draw can also feel familiar to people who have previously smoked, and many MTL devices are compact and straightforward to use.

Because MTL devices usually operate at lower power, they can work well with higher nicotine strengths and e-liquids designed for lower-powered kits, including nicotine salts and 50/50 e-liquids.

The trade-off is lower vapour output and a more restricted draw. If you prefer a very open inhale or large clouds of vapour, MTL is unlikely to provide the experience you are looking for.

Benefits and Considerations of DTL Vaping

DTL vaping is designed for a more open draw and higher vapour output. It gives the user more airflow than MTL and is commonly associated with higher-powered devices, lower-resistance coils and high-VG e-liquids.

The higher output can provide a fuller vapour experience, but it also means DTL setups generally use more e-liquid and battery power. Because a larger volume of vapour is inhaled with each puff, lower nicotine strengths are typically used than with MTL vaping.

DTL devices can also require more attention to wattage, airflow and e-liquid compatibility than simpler low-powered setups, particularly when using more adjustable hardware.

Benefits and Considerations of RDL Vaping

RDL vaping offers a more open draw and greater vapour output than MTL while remaining more restricted than a typical DTL setup. It is particularly common with adjustable pod kits that can support different airflow settings and coil or pod resistances.

This flexibility can make RDL useful for people who want more vapour than a traditional MTL setup without moving to a fully open, higher-output DTL device.

As with the other styles, the experience depends on the specific device, airflow, coil or pod and e-liquid used, so RDL should not be defined by a single resistance or wattage range.

“The right vaping style comes down to the draw you prefer - tighter with MTL, more open with DTL, or somewhere in between with RDL.”

Which Vaping Style Is Right for You?

MTL is usually the closest fit if you prefer a tighter draw, lower vapour output and a lower-powered device.

RDL may suit you if you want a more open inhale and greater vapour production than MTL without moving to a fully open DTL draw.

DTL is the better match if you prefer an open airflow, larger vapour output and a higher-powered setup.

Many modern devices offer adjustable airflow or multiple compatible pod and coil options, so one kit may support more than one style. The manufacturer’s recommended wattage and compatible coil or pod range should always guide how the device is used.

FAQs

Is MTL or DTL better for beginners?

MTL is often the easiest starting point for people moving from cigarettes because the tighter draw can feel familiar and many MTL devices are simple, lower-powered pod or vape pen kits. However, the best style ultimately depends on the type of draw and vapour output you prefer.

Which vape style is closest to smoking?

MTL vaping generally feels closest to cigarette smoking because vapour is drawn into the mouth before being inhaled into the lungs, and the airflow is typically tighter than with RDL or DTL vaping.

Which e-liquid is best for MTL vaping?

Nic salts and 50/50 e-liquids are commonly used with MTL devices because their thinner consistency suits many lower-powered coils and pod systems. Always check the recommended e-liquid ratio for the specific coil or pod you are using.

Which e-liquid is best for DTL vaping?

DTL setups are commonly used with high-VG e-liquids, which are better suited to many higher-powered, higher-vapour devices. Always check the recommended PG/VG ratio for the specific coil and device you are using.

Does airflow affect MTL and DTL vaping?

Yes. MTL setups typically use a tighter airflow, DTL uses a more open airflow, and RDL sits between the two. On devices with adjustable airflow, opening or restricting the airflow can change how loose or tight the draw feels, although the device, coil and recommended power range still determine which styles it is designed to support.

Can the same vape kit be used for MTL and RDL?

Some vape kits can support both MTL and RDL vaping, particularly pod kits with adjustable airflow and multiple compatible pod or coil resistances. However, not every coil or pod is designed for every style, so check the manufacturer’s recommended resistance, wattage and airflow range before changing how you use the device.

About the Author: Dan Judd

Dan Judd, Head of Digital at Vape Superstore, has been a pivotal figure in the company since joining in 2018. Beginning his personal vaping journey in 2015 as a means to quit smoking, Dan not only understands the products but also the transformative power of vaping. Armed with a Bachelor's Degree in Business Management & Marketing from Leeds Beckett University, Dan seamlessly blends academic prowess with real-world experience. Dan is committed to educating the wider community about the benefits of vaping and its potential in leading a smoke-free life.

Read all articles by Dan Judd

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