This is a UNITED ARROWS & SONS exclusive thermal shirt from Russell, in navy (original price: 7,480 yen). It's very comfortable and has a relaxed silhouette, making it suitable to wear on its own or over a white T-shirt. (Excerpt from the website) ■ Thermal shirt specially made for URUSSELL ATHLETIC. ■ Design: Crew neck and ribbed cuffs, specially designed. It features a textured surface and a relaxed silhouette with a unique feel. This versatile item is carefully crafted to be worn on its own or as an inner layer under a jacket. ■ Material: Made from 100% soft cotton honeycomb waffle material.