A heavyweight merino base layer top that supports body climate regulation during high-intensity activities. The 260 ZoneKnit long-sleeve shirt with a crew neck is the ideal choice for aerobic training sessions and adventures in cold weather. Made from 100% merino wool, ZoneKnit offers natural breathability and odor control, while strategically placed merino mesh inserts aid in body climate regulation and allow the skin to breathe. Raglan sleeves and underarm gussets provide freedom of movement, and flat-locked seams prevent chafing. Inspired by nature, icebreaker leverages the functional properties of natural fibers to offer an alternative to synthetic clothing. Merino wool is an annually renewable fiber that naturally resists odor. It cools when it's hot and warms when it's cold, allowing the skin to breathe and providing long-lasting comfort. ZoneKnit - Bodymapping technology supports body climate regulation and allows the skin to breathe during high movement intensity. Thumb loops prevent the sleeves from riding up and keep the hands warm. Raglan sleeves and underarm gussets ensure freedom of movement and comfort. Flat seams prevent chafing. Extended back for more coverage. 100% merino wool, temperature regulation, breathable, moisture management, naturally odor-resistant. Wash gently on a cold wash cycle in the washing machine. Wash with similar colors. Do not use fabric softeners. Do not bleach. Do not tumble dry. Hang to dry in the shade. Do not iron hot. Do not dry clean.