Explore swim trunks and rash guards for boys from the likes of Kanu Surf, Shein, Adidas, Russell, Nike, etc. OshKosh B’gosh is a leading children’s apparel and clothing brand. OshKosh B’gosh was founded in OshKosh in 1895, and initially, it was known as the Groove manufacturing company. Just like a rainbow, you can see all colors in such products.