Re-envisioning our Iconic Slip-On with Purposeful Materials Weve rebuilt some of our most iconic Classics with purposeful choices about the materials we use. Featuring uppers made from organic cotton canvas, an outsole that uses natural rubber, and a biobased foam footbed for comfort you can feel good about, the Classic Slip-On VR3 maintains all the essential Vans DNA while taking a new step in the right direction.