The most important rule for dressing for a Pompeii tour in 2026 is to prioritize comfort and sun protection over fashion. You will be walking for several hours on ancient, uneven volcanic cobblestones, so sturdy, closed-toe walking shoes or trekking sneakers are essential; avoid sandals or thin-soled shoes that can lead to blisters or twisted ankles. During the hot summer months (June–September), wear lightweight, breathable fabrics like linen or moisture-wicking cotton in light colors to reflect the intense Mediterranean sun. A wide-brimmed hat, high-quality sunglasses, and plenty of sunscreen are non-negotiable, as there is very little shade within the ruins. In the "shoulder" seasons (spring and autumn), use a layering system with a light t-shirt and a windbreaker or sweater for the cooler mornings. While there is no strict "religious" dress code at Pompeii, modesty is appreciated, and carrying a light scarf can be helpful if you plan to visit nearby churches in the modern city. Always pack a refillable water bottle to use at the site's ancient but functional public fountains.