Calvin Klein Underwear Eco Lounge Crew Neck Tee in Black. Size XS, S, M. 57% cotton 38% poly 5% elastane. Made in Sri Lanka. Machine wash. Front and back logo detail. Slit side detail at hem. Item not sold as a set. CKUD-WS6. QS6701. One of the most recognizable designer names in the world, Calvin Klein exudes signature sensuality and sexuality through classic styles and minimalist designs.