A Puffy 90s Style Inspired by the Past, but Built for Today The Knu Skool is a modern interpretation of a classic 90s style, 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 Shoes play off of the original Old Skool while blending an icon of the past with todays trends. Reissued 90s low-top shoe Sturdy suede and canvas uppers Puffy tongue and ankle collar Puffy 3D molded Sidestripe Heel pulls for ease of entry Signature rubber waffle outsoles Size 4.5 VANS Knu Skool Shoes (gray/black) Unisex Grey, Size 4.5 Grey Unisex, Shoes, Low-Top adult.