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From fastpack trips to skyline runs, the La Sportiva Blizzard Windbreaker is a staple in our kit. The featherweight build brushes off drizzles and dulls icy winds, while the breeze-inviting laser-cut details and breathable side and underarm inserts ensure we don't get muggy underneath. As we pick up the pace, the upper back's mesh panel lets excess heat pump out, keeping us cool through the grind. When the winds die down and the mist clears, we stuff this layer away inside its own mesh pocket.