Adidas Yeezy Foam RNR SulfurSize Guide These fit snug, so go for a size up. If you normally wear a UK8 8. 5, go for a UK 9, especially if you have wider feet. Constructed with a blend of EVA foam and recycled materials, adidas Yeezy Foam RNNR Sulfur arrives in an identical build to prior Foam RNNRs. Oval cut openings throughout the neutral toned design create a sculptural look while providing ventilation. At the base, a cushioned footbed offers comfort and support. Key Features: