There is no official "formal" dress code for the Pompeii Archaeological Park in 2026, but there is a practical and respectful code you should follow. You are not allowed to enter the site in swimwear, shirtless, or in overly revealing "beach" attire; security may stop you if they deem your clothing disrespectful to the site, which is essentially a massive cemetery. However, the most important "code" is for your own safety: you must wear sturdy, closed-toe walking shoes. The ancient Roman roads are made of large, uneven basalt stones and deep ruts that can easily twist an ankle or cause a fall if you are in flip-flops or sandals. Because the site is almost entirely unshaded and the 2026 Mediterranean summers are increasingly hot, it is highly recommended to wear light-colored, breathable clothing, a wide-brimmed hat, and polarized sunglasses. Most tourists in 2026 opt for "hiking-lite" gear—moisture-wicking t-shirts and shorts—which is perfectly acceptable to the park authorities while providing the comfort needed for a 4-to-6-hour walk.