The MONTANE Sirocco Lite insulated jacket merges versatile performance with sustainable materials. Designed for fast-paced activities, it features breathable wind resistance to maintain warmth without overheating. Recycled nylon, PFC-free DWR coating, and an insulated core provide comprehensive protection and comfort. The jacket’s 4-way stretch fleece paneling ensures unrestricted movement. Its smooth outer fabric makes it ideal for layering during trail running, climbing, or other outdoor adventures.