The oversized black blazer with cuffed sleeves and gold embellishments on the shoulder adds an edgy touch to Effy's outfit. The fabric appears to be a smooth, possibly synthetic material. The oversized fit and cuffed sleeves give the jacket a casual, laid-back vibe. The gold embellishments add a touch of luxury and sophistication. The blazer is worn over a white shirt, adding a layer of depth to the outfit.