Why to Take Off Jewelry and Metal Before You Go In

Why metal conducts heat

Metal is an excellent conductor of heat. When you place a metal object in a hot room, it quickly absorbs thermal energy from the surrounding air and rises to the same temperature as that air. In a traditional sauna, where air temperatures commonly range between 150°F and 195°F (65.5°C to 90.5°C) according to the Cleveland Clinic, any metal you bring in will become hot enough to burn bare skin within minutes. A ring, necklace, or pair of glasses left on a bench can reach that temperature and cause an injury the moment you touch it.

Wood, on the other hand, is a poor conductor. That is why sauna benches and walls are made from softwoods, and why you can sit comfortably on a bench while the air around you is scorching hot. The contrast between wood and metal is stark: what feels warm on a bench can be dangerously hot on a metal fastener or button. If you are planning a home sauna, consider a model with wooden interiors and well-insulated metal parts, as covered in our traditional sauna buying guide.

What metal to remove before entering

Before you step into any sauna, take a few seconds to scan your body and pockets for metal. The list is short but easy to forget.

If you wear body piercings that you prefer not to remove, consider covering them with a medical-grade plastic retainer or taping them with a heat-resistant barrier. Even small metal inserts can transfer heat and cause localized burns. For more guidance on what to wear, read our article on what to wear in a traditional sauna.

• Rings, including wedding bands and fashion rings
• Necklaces and pendants
• Earrings and other piercings
• Bracelets and watches
• Metal glasses frames (see our guide on glasses and contacts in heat)
• Hair clips, bobby pins, and snap buttons
• Metal zippers and belt buckles
• Coins or keys in pockets

Infrared saunas are not exempt

Infrared saunas operate at lower air temperatures, usually between 110°F and 135°F (43.3°C to 57.2°C), as noted by the Cleveland Clinic. You might assume that metal is safe at those levels, but 110°F is still hotter than the hottest tap water you would use for a bath. Metal at that temperature can cause first-degree burns without you noticing until it is too late. The same physics applies: any metal object will equalize with the air. The only difference is that it takes a little longer to heat up in a cooler room, but it will still get hot enough to sting.

We recommend taking the same precautions in an infrared sauna as you would in a traditional one. The lower temperature reduces the margin of time you have to react, not the risk itself. If you are shopping for an infrared unit, our infrared sauna buying guide covers models with safe, insulated interiors.

Metal on benches and walls

Beyond personal jewelry, pay attention to metal fixtures inside the sauna. Most quality saunas use wooden benches and guards around the heater, but you may encounter exposed metal screws, brackets, or steam-head covers, especially in steam showers or combination units. When you sit down, always place a towel between your skin and any surface you are not sure about. This is especially important on the lower bench, where hot air rises and you might rest your forearm on a metal edge.

Heaters, of course, are the hottest part of any sauna. They are designed to be hot and must be guarded, as explained in our article on heater guards and burn prevention. Never let your jewelry or any metal object touch the heater stones or the heater body. For guidance on choosing a safe heater, see our sauna heater buying guide.

Safe practices for a comfortable session

The simplest rule is to leave all metal outside the sauna. Many saunas have a changing room or locker where you can store your valuables. If you forget, place your items on a cool surface outside the sauna and retrieve them when you are done. Do not put them in a plastic bag or on a wooden bench inside the hot room; they will still heat up.

Following these habits will keep your skin safe and let you focus on the relaxation and detoxification benefits that saunas are known for. The brief sting of a forgotten ring is easily avoided with a simple checklist.

• Check your pockets before entering.
• Keep a towel on the bench to create a barrier.
• If you wear metal-framed glasses, consider contacts for the session, but read about glasses and contacts in heat first.
• Use a wooden or plastic bucket for water and never bring metal containers in.
• After your session, wait a few minutes in the cool-down area before putting jewelry back on.

What to pick for your use

Questions

Can I wear my wedding ring in a sauna?

It is best to remove it. A wedding ring is in constant contact with your finger, and if the sauna air is hot, the metal will heat up and can burn the skin under the ring. Some people wear a silicone band instead, but for the real metal ring, take it off.

Do I need to remove jewelry in an infrared sauna?

Yes. Although infrared saunas run at lower air temperatures (about 110°F to 135°F), metal still gets hot enough to cause discomfort or a mild burn. The risk is lower, but it is still present. Remove or cover metal items.

What about metal hair clips or zippers?

Those are also a burn risk, especially if they press against your skin. A metal zipper on a towel or robe can heat up and mark you. Use a plastic hair clip or tie your hair back without metal.

How long does it take for metal to heat up in a sauna?

In a traditional sauna, which typically runs between 150°F and 195°F, a small metal object can become uncomfortable in less than a minute, and potentially burn in a few minutes. The exact time depends on the object's size and material, but the safe assumption is that any metal you bring in will become too hot to touch.

What should I do if I forget to remove my jewelry?

Leave the sauna briefly to remove the item and place it outside. If you are already inside, do not try to take it off quickly, as the metal may already be hot. Use a towel to handle it if necessary, and set it on a cool surface outside the sauna before continuing.