Vans Knu Skool in Black Gum. These sports shoes feature a flat heel and lace-up fastening. The uppers are made of 100% leather, with a 100% textile lining and cushioning, and a 100% rubber sole. A modern interpretation of a classic 90s style, the Knu Skool is defined by its puffed up tongue and 3D-molded Sidestripe, and tied off with oversized, chunky laces. With its in-your-face profile and dramatic style details, the Knu Skool plays off of the original Old Skool while blending an icon of the past with today’s trends.