Calvin Klein Men's Cotton Classic 5-Pack Slim Undershirts White Size S Display box, opened. Shirts are new and unworn. LIGHTWEIGHT: Durable, 100% pure cotton fabric makes Calvin Klein’s t-shirts for men light and soft for all-day wear. KEEP COOL: Calvin Klein tees are designed to be naturally ventilating with a breathable feel. ADAPTABLE STYLE: Go from sporty to sophisticated by pairing CK’s men’s t-shirts with your go-to suit. CONSIDERED DESIGN: With the perfect fit for everyone , Calvin Klein’s mens t-shirts are designed to pair with everything in your wardrobe—or be worn alone for the ultimate in confident, casual style. DESIGNED IN THE USA: Calvin Klein’s tee shirts for men are created by its NYC-based global design team using premium imported materials.