Air Force 1 Low Acorn 2021 The 2021 edition of the Nike Air Force 1 Low ‘Acorn’ brings back a popular earth-toned colorway of the classic hoops silhouette. The upper combines light tan canvas with leather overlays in a subtle beige finish. The same hue is repeated on the Swoosh and Nike branded woven tongue tag. A standard AF1 cupsole anchors the low-top, complete with encapsulated Nike Air cushioning in the heel. Underfoot, the brown rubber outsole features a traction pattern made for pivoting on the hardwood.