Cotton blend. 13"" in the knee narrows to 10"" at the leg opening. GENE-WJ293. W1197 1Q 02 CLY. After many years in the denim industry, the creative minds of Genetic Denim know that when it comes to style, it's all in the jeans. Composed of the highest quality cloth, Genetic brings denim back to the fundamentals creating a true basic jean that is about fit and flattery.