Louis Roederer Brut Collection is the modern, multi-vintage (NV) Champagne that replaced the classic Brut Premier, featuring a unique number (e.g., 245) reflecting its base vintage and incorporating Perpetual Reserve wines and oak-aged reserves for richness and complexity, offering vibrant fruit, creamy texture, and mineral freshness with notes of citrus, brioche, and chalk, showcasing a shift to adapt to changing climate while maintaining the house style.