Rukka t-shirt for men. Normal fit. No irritating side seams. The fabric quickly wicks moisture away, keeping the skin dry and feeling comfortable. The product's stretch material flexes in four directions, providing complete freedom of movement. The fabric is designed for outdoor use, especially in sunny conditions. The fabric has a UPF protection factor of 30 (Ultraviolet Protection Factor). This number indicates that only one-thirtieth of the sun's harmful UV rays reach the skin. The protection is based on the fabric's weaving technique; it is not achieved through chemicals.