Setup, Compatibility & Care
To ensure your Ultraboost 21s last, wear them for shorter durations initially to allow the upper to conform to your specific foot shape. Because these trainers feature a white exterior, it is recommended to treat the mesh with a water-repellent spray before first use to prevent staining. When cleaning becomes necessary, wipe down the midsole with a damp cloth and mild soap. Avoid putting these trainers in a washing machine or dryer, as high heat can damage the integrity of the foam cushioning and the fabric adhesive. Store them in a cool, dry place away from direct sunlight to prevent material yellowing.