This is the Best Darn Hiking Shirt you can buy. Great for hiking, traveling and other outdoor adventures. Made with 100% spun polyester, this shirt feels like cotton, but without the added risk of hypothermia that cotton creates when wet. Unlike cotton which is a big no-no for outdoor activities, polyester continues to provide warmth when wet, making it the go-to fiber for outdoor activities. Additionally, this shirt is embedded with moisture-wicking and anti-microbial technology which helps keep you dry and the shirt odor free. Beyond the technical specs, this shirt simply works - it is incredibly comfortable, fits well and is perfect for your outdoor adventures, big or small!