Finding the right backpacking jacket for 2026 involves balancing three specific needs: , weather protection , and weight . A single "do-it-all" jacket rarely exists; instead, most experienced backpackers use a layering system composed of a shell, a mid-layer, and a puffy. 1. The Core Insulation Choice: Down vs. Synthetic The biggest decision is what's inside your "puffy" jacket. Ultralight Backpacking Clothing Layering System 2026