Calvin Klein 20's Short Sleeve Hero Monologo Tee in Casual Blue. Size L (also in M, S, XL/1X). 100% cotton. Machine wash. Front tonal logo detail. Lightweight jersey fabric. CALK-MS81. 4RB862G. Calvin Klein is one of the most recognizable designer names in the world. The American brand offers modern, sophisticated styles with a clean and sexy aesthetic, resulting in classic wearable urban designs.