A seamless long-sleeve T-shirt in a plated knit fabric in which two types of yarns, full-dull micro staple fibers and Primeflex® functional yarn, are knitted back-to-back on the front and reverse sides of the fabric to generate a high quality, springy feel. It has a cotton-like feel with excellent stretchability, and supersonic (ultrasonic welding) processing enables a reduction in the number of sewn points to minimize skin contact with seams. With a minimalist, streamlined design, the natural stretch of the fabric adds to the level of comfort. The fabric is non-transparent and the slightly loose-fitting box silhouette creates a relaxed fit.