ADVANCED TECHNOLOGY: Columbia Men's Thistletown Park Short Sleeve Crew Shirt features our signature UPF 15 fabric that helps to blocks harmful UVA and UVB rays as well as wicking technology to help keep you dry and cool on the trail.SIGNATURE LOGO: Our signature Columbia logo is featured at the chest for subtle style.COMFORTABLE FABRIC: 67% polyester and 33% cotton fabric is soft on the skin and allows for a comfortable fit.VERSATILE STYLE: A crew neckline and short sleeves make this shirt versatile enough for everyday, casual wear.OMNI-SHADE: Be safe and protected. Omni-Shade blocks UVA and UVB rays to help prevent sunburns and long-term skin damage. The tight weave construction with UV absorbent yarns block the full spectrum of harmful UV rays.