In hot, humid climates, select a foundation that manages oil and minimizes shine. Powder foundations absorb oil and sweat, offering a long-lasting matte and fresh appearance. They keep skin non-greasy and feel light, providing comfort in humid conditions. Oil-based foundations can cause greasiness and heaviness, making them unsuitable for humid weather. "Matte" refers to a finish, not a foundation type itself. Waterproof formulations offer sweat resistance but do not control oil as effectively as powder foundations. Consequently, powder foundation is the optimal choice for hot and humid environments.