Smartwool W's Classic Thermal Merino 250 BL Crew is a women's long-sleeved thermal shirt made of 100 % Merino wool with an improved fit for enhanced functionality and aesthetics. Flatlock seam construction helps prevent chafing and increases comfort levels. It is an ideal garment to wear on colder days and during your skiing, hiking, climbing or cycling tours. In short, it is comfortable and perfect for all kinds of activities!