Airflow & Zugtechnik

MTL - Mouth to Lung: Traction technology and hardware explained

MTL guide: How mouth-to-lung vaping works with narrow draw technology. Tips on coils, liquids, nicotine strength and hardware for back vaping from 18.

MTL stands for ‘Mouth to Lung’ and refers to the inhalation technique where you first draw the vapour into your mouth and then draw it into your lungs. This method most closely mimics the act of smoking a traditional cigarette and is therefore the most common way for people to switch from smoking tobacco. An MTL setup uses a tight draw, higher resistance and lower wattage – quite unlike a DL setup designed for thick clouds. This guide explains how MTL vaping works technically, what to look out for with coils, e-liquids and airflow, and what mistakes to avoid as a beginner.

MTL describes the inhalation technique where you first draw the vapour into your mouth and then inhale it into your lungs with a second, deliberate breath. In contrast, there is DL (‘Direct to Lung’), where the vapour is inhaled directly and in large quantities deep into the lungs. In German-speaking countries, MTL is also known as ‘back-of-the-mouth vaping’, because the vapour lingers briefly in the mouth – that is, behind the cheeks.

You can recognise a typical MTL setup by three features: a restricted airflow (often adjustable via small openings), coils with a resistance above 1.0 ohms and a narrow drip tip. The power output is usually between 8 and 18 watts. This produces a compact, warm vapour with an intense flavour rather than a large cloud of vapour. This characteristic makes MTL vaping pleasant for those switching from cigarettes who are looking for that familiar ‘cigarette draw’ whilst also wanting to enjoy a clear flavour.

The MTL vaping technique is based on a controlled, slow draw. You take an even drag on the e-cigarette for about two to three seconds, hold the vapour briefly in your mouth and then inhale. The high coil resistance ensures that not too much e-liquid is vaporised, and the restricted airflow condenses the vapour.

Hardware for MTL

Classic pod systems, MTL tanks with narrow airflow slots and pen-style devices are suitable. Pod systems with replaceable pods ranging from 1.0 to 1.4 ohms deliver consistent results and are suitable for everyday use. Refillable tanks with MTL coils (e.g. 1.2 ohms or 1.6 ohms) offer more flexibility when choosing e-liquids.

Suitable e-liquids

E-liquids with a high PG content (50/50 to 60/40 PG/VG) are suitable for MTL. PG carries flavour better and produces the typical ‘throat hit’. Nicotine strengths of 6 to 20 mg/ml (for nicotine salt) are common – base your choice on your previous cigarette consumption. The sale of nicotine-containing products in Switzerland is restricted to persons aged 18 and over.

The right setup determines whether MTL vaping works for you. The following points will help you choose:

Coil resistance: Choose atomiser heads between 1.0 and 1.8 ohms. Below 1.0 ohms, you enter the sub-ohm range, which is designed for DL and produces excessively hot, dense clouds of vapour.
Airflow adjustment: Adjustable airflow is valuable because you can tailor the tightness to your lungs. Start with the airflow closed and open it gradually until the draw feels comfortable.
Choosing a nicotine form: Nicotine salt (Salt-Nic) takes effect faster and is less harsh than free-base nicotine – ideal for those switching from traditional cigarettes. Free-base nicotine offers a more pronounced throat hit, but becomes harsh at high mg levels.
PG/VG ratio: Too much VG (>60%) can clog coils and narrow airflow channels. Stick to 50/50 or 60 PG / 40 VG for consistent performance.
Stick to the recommended power: Use MTL coils within the wattage range specified by the manufacturer. Too much power leads to a burnt taste (‘dry hit’) and shortens coil life.

Common mistake: Beginners use sub-ohm devices with MTL vaping technique – the result is too much vapour, a scratchy throat and high e-liquid consumption. If you want MTL, you need the right hardware.

Is MTL better than DL for beginners?

For those switching from cigarettes, usually yes. MTL mimics the familiar draw, requires less power and is more discreet. DL is aimed at vapers looking for big clouds and intense flavours at low nicotine strengths.

What nicotine strength suits MTL?

Heavy smokers (over 15 cigarettes a day) often start with 18 to 20 mg/ml nicotine salt. Moderate smokers choose 10 to 12 mg/ml, occasional smokers 6 mg/ml. Reduce the strength as soon as you find yourself taking more frequent and longer puffs than usual.

How long does an MTL coil last?

Depending on the e-liquid and usage, between one and three weeks. Sweet or dark flavours (dessert, tobacco) shorten the lifespan because sugar caramelises on the wire. Replace the coil at the latest when the flavour starts to taste burnt.

Can I combine MTL and DL with one device?\nWith mods that support interchangeable tanks and coils, yes. You switch the tank or coil head and adjust the airflow and wattage. However, it is easier to use two dedicated devices for the two vaping styles.

MTL vaping remains the most accessible entry-level technique for anyone looking for a tight, warm draw with a clear flavour experience. Key factors are coils above 1.0 ohms, a restricted airflow and e-liquids with sufficient PG. In our range of pod systems, you’ll find compact MTL devices for everyday use, compatible replacement coils and a wide selection of e-liquids in various nicotine strengths. Take your time to compare before deciding on your first or next setup.