Shop boys' underwear in red, blue, green, yellow, gray, and many more interesting colors. Calvin Klein Inc. is an American fashion brand that was set up in 1968. It was established by the popular fashion designer Calvin Klien. Lifestyle and home accessories, watches, fragrances, and more. Navy blue is the most common color for denim and dress pants. Varieties of materials such as Cotton, Blend and Microfiber allow you to buy the best one. Each will provide you different experience and durability of Calvin Klein Navy Blue Underwear for boys.