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Unlock the ultimate in lightweight warmth with the men's Burton [ak] BK Lite Insulator. It features the same responsibly sourced ultra-premium 800 RSD down fill found in the infamous [ak] BK Down Insulator and packs it into a quilted block pattern featuring an articulated fit and stretch fabrication. This reduces size and weight, and ensures freedom of motion where you need it most. All colorways are bluesign approved for a reduced impact on people and the planet. Built with layering up or down in mind, the BK Lite also packs into its own pocket for quick and convenient storage.