Dressing for the Dolomites in 2026 requires a high-performance layering system because mountain weather is notoriously volatile, even in summer. Your base layer should be moisture-wicking (merino wool or synthetic), followed by an insulating mid-layer like a fleece or lightweight down jacket. A waterproof and windproof shell (Gore-Tex) is essential for sudden rain or wind on high passes. For footwear, sturdy, ankle-supporting hiking boots with Vibram soles are non-negotiable for the rugged, rocky terrain; trail runners often lack the necessary traction for scree slopes. In winter, add thermal leggings, insulated ski wear, and "micro-spikes" for icy paths. Always pack a warm beanie and gloves, as temperatures at elevations like the Tre Cime can drop below freezing even in July.