- Navy blue T-shirt for boy - Round neck, short sleeves - Embossed stripe pattern, exclusive IKKS logo embroidery on chest - Striped ribbing on collar and sleeves « Protect the planet and your clothes when you wash them by using a GUPPYFRIEND® wash bag » Raised stripes. Exclusive IKKS logo embroidery on the chest. A sober, timeless color. The navy blue T-shirt never disappoints. For a smart casual look.