Sensuously soft and decadently warm the Sierra ½ Zip by Icebreaker is made from brushed Merino wool fleece that is the must have shirt this winter. Featuring a zippered stash sleeve pocket, venting ¼ zip neck collar, articulated raglan sleeves, gusseted design, interior zipper guard, all to optimize mobility, and comfort. This is the must have shirt for any man’s wardrobe this winter. This shirt is appropriate for cold or very cold weather.