After smartphones, smartwatches and wireless earbuds, the next major step in wearable technology may not be another device placed on the body, but the clothing itself. The development of electronic textiles, or e-textiles, is making it possible to integrate sensors, conductive threads and other electronic components directly into fabrics. An ordinary-looking T-shirt, sock, jacket or pair of sports leggings could therefore monitor the body, react to surrounding conditions or communicate with other devices.
Healthcare is one of the most promising applications. Smart garments can incorporate sensors capable of monitoring heart rate, breathing, body temperature and movement. Researchers are developing systems for continuous patient monitoring in which measurements are collected through the fabric rather than through separate devices attached to the skin. Other technologies can analyse posture and movement, potentially assisting rehabilitation, sport and physically demanding work. In the future, such clothing could transmit selected information to a smartphone or medical system when the user has given permission.
Sport is another area with considerable potential. Instead of wearing several separate sensors, athletes could use clothing that monitors movement, physical load and other indicators. This could allow more detailed analysis of training and recovery. Researchers are also developing textiles capable of heating or cooling particular areas of the body, as well as fabrics incorporating LEDs and other active components.
The technology is gradually moving away from simply attaching conventional electronics to clothing. Conductive fibres, specialised inks, miniature sensors and flexible electronic components can increasingly become part of the fabric itself. The challenge is to preserve the qualities consumers expect from clothing – it must remain lightweight, flexible, comfortable and durable enough for everyday use.
This is where some of the biggest technical difficulties emerge. Clothes are repeatedly bent, stretched and washed. Their electronic components therefore need to withstand moisture, sweat, detergents and mechanical stress. Power is another challenge, particularly when batteries have to remain small, lightweight and safe. Researchers are consequently exploring low-energy electronics, removable power modules and technologies that could eventually reduce dependence on conventional batteries.
As smart clothing develops, however, another major question arises: what happens when it is thrown away? An ordinary T-shirt and an electronic device normally enter completely different recycling systems. A smart shirt could contain both at once – textile fibres, synthetic polymers, metallic conductors, silver compounds, sensors, electrodes, microchips and sometimes a battery.
This creates a new type of hybrid waste. Textile recycling facilities are generally not designed to process garments containing electronic components, while electronic-waste facilities are not intended to handle large quantities of fabric and fibres. If sensors and conductive materials are permanently printed, bonded or woven into the textile, separating them at the end of the garment’s life can become extremely difficult.
The issue is particularly important because the world already produces enormous quantities of waste. Around 62 million tonnes of electronic waste were generated globally in 2022. Textile waste is estimated at roughly 92 million tonnes annually and could reach around 134 million tonnes by 2030. If smart clothing becomes a mass-market product without systems for reuse and recycling, it could combine two existing environmental problems into a new and difficult waste stream.
Some electronic textiles also contain valuable materials that should not simply end up in landfill. Silver, for example, can be used in conductive threads, electrodes and sensors. Other specialised materials, including graphene, may also be incorporated into advanced fabrics. Some are expensive to produce, while improper disposal or incineration can create additional environmental concerns.
For this reason, researchers increasingly argue that smart clothing should be designed for disassembly from the beginning. Instead of permanently attaching batteries, sensors and control electronics to the fabric, some components could be removable and replaceable. When the textile wears out, the electronic module could potentially be reused or sent to an appropriate recycling stream while the fabric is processed separately.
Regulation has not yet fully caught up with the technology. Separate rules exist for textiles, chemicals, batteries and electronic waste, but smart clothing can fall into several of these categories simultaneously. Research published in 2026 identified this gap between textile and electronics regulation as one of the challenges facing the sustainable development of electronic clothing.
The European Union is already developing broader requirements covering ecodesign, durability, repairability and the circular economy, but electronic textiles do not yet have a fully developed regulatory framework specifically covering their entire life cycle. Possible measures include requiring manufacturers to provide clear information about the materials used, repair options, disassembly and correct treatment when a product reaches the end of its useful life.
There is another important issue – personal data. If a shirt continuously measures heart rate, movement or other indicators and sends them to an application or cloud service, it is no longer simply a piece of clothing. It becomes a connected electronic device. Data security, user control over collected information and clear consent could therefore become just as important as comfort and fabric quality.
The potential of smart clothing is considerable. Electronic textiles could make health monitoring less intrusive, provide new tools for athletes, support rehabilitation and create entirely new ways for people to interact with technology. But they also raise an unusual question: what happens when a T-shirt is simultaneously clothing, a sensor, a computer and potentially electronic waste?
That question needs to be addressed before electronic textiles become truly mainstream. If manufacturers adopt repairable and separable designs and recycling rules evolve alongside the technology, smart clothing could become a useful new category of wearable electronics. If these issues are postponed, the next technological revolution in clothing could also contribute to a new mountain of difficult-to-recycle waste.
