Bodyfitzone constructionthe zone features icebreaker39s bodyfitzone construction which combines lightweight 200gm stretch merino wool with strategically placed merino mesh panels to help regulate temperature during stop and go days of skiing climbing and cold weather hiking flatlock stitching keeps these bottoms from chafing during day after day of dynamic motion the natural odour resistance of merino also means more time between washes great for multi day adventures in the hills and m