A day of wellness is all about relaxing, enjoying and recharging your batteries. To make that experience as pleasant and hygienic as possible for everyone, we have some clear, but simple rules regarding the dress code in our thermal baths. That way, you know exactly what you can take with you and enjoy a day of sauna and wellness.
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With the right swimwear, slippers and bathrobe, you will be fully prepared for a wonderful day at our thermal baths. Read all about our dress code, leave your worries behind, come in and enjoy pure wellness, tranquillity and pampering.
Men are required to wear short, fitted swim shorts. Loose swim shorts are not allowed as they absorb more water, dry more slowly and bring dirt and substances from outside into our baths and saunas. All this has a negative impact on our water quality, something we obviously care about a lot.
Women are welcome in a bikini or a swimsuit. Note: a bathing suit should have an open neckline, with no sleeves or legs. Classic, elegant and totally wellness-proof!
Slippers are mandatory in the thermal baths. They protect you from slipping and allow you to walk around in all safety and hygiene. Preferably use non-slip slippers, so you can safely move from sauna to swimming pool and from steam bath to relaxation area.
In some areas, such as our restaurant, a bathrobe is required. Not only does this feel comfortable, it also ensures hygiene and discretion while you enjoy a snack or drink.
Going into the sauna? Leave your bathrobe and slippers outside. It will give your body the chance to fully relax and purify, just as it should during a sauna session.
Didn't bring a suitable bathing suit, bathrobe or slippers? No problem! You can easily rent these at reception, so you don't have to miss out on your day of relaxation!
A few final tips: swimming goggles, diving masks and all headgear are prohibited in our thermal baths, so it's best to leave them at home.
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Stretch out summer with our exclusive Indian Summer offer at Thermae Grimbergen! From 1 September to 24 October 2025 inclusive, you can enjoy a wonderful wellness day on weekdays at a discount of more than 25%.
