The berghaus chonzie half zip fleece is thermally efficient and seals heat around your core using an at optic 100 polyester knit face marl structure with brushed reverse which increase comfort and warmth outdoors features at optic 100 polyester knit face marl structure with brushed reverse this layer effectively retains heat to ensure that you remain warm outdoors 1x zipped chest pocket provides protection for your essential gear stretch binding at cuffs and hem these provide a comfo