The perfect baselayer for spring slush days, the Ortovox Men's Merino Rock'N'Wool Short-Sleeve Shirt is made entirely from merino wool to handle the fluctuations of your body temp on the hill. It wicks moisture away from your skin during demanding hikes and delivers rapid cooling through rest periods. It also brings warmth back to your core when it needs it most. Plus, it's naturally odor-resistant to combat the build up of stink at the end of the day.