The perfect all-season, all-purpose base layer, the Icebreaker BodyFit150 Short Sleeve Atlas Shirt moves moisture away to keep you dry and comfortable, and insulates when you need an extra edge. Fashioned in 100% New Zealand pure Merino wool, this fine knit shirt is super soft, naturally elastic, as well as odor and static free. Non-itchy and fine like silk, the Merino helps regulate your body temperature during an aerobic workout, so you don't overheat or get chilled. Forward side and shoulder flat-sewn seams with a full range underarm gusset provide premium mobility and comfort. Great for a morning run, trek, ski, or casual lounging, the 'green' BodyFit150 Short Sleeve Atlas Shirt is SPF 25 UV protective and machine washable.