POPSUGAR x Old Navy Karate Built-In Flex Max Slim Taper Jeans For Boys The PS x ON Karate Built-In Flex Max Slim Taper Jeans For Boys ($30) come in sizes 5-18. We like them styled with high-top sneakers like how Jensen wears his. Image Source: oldnavy.gap.com PS x ON Karate Built-In Flex Max Slim Taper Jeans For Boys $30 from oldnavy.gap.com Buy Now