Sizing: The adidas UltraBOOST 1.0 W is a UK size 6 for adult feet. For the best fit, it's recommended to consult the official adidas size chart and consider trying them on, as shoe sizing can sometimes vary between models and brands. Always ensure there is a thumb's width of space between your longest toe and the end of the shoe. Care: To maintain the appearance and longevity of your UltraBOOST sneakers, regular cleaning is advised. For general dirt on the Primeknit upper, gently wipe with a damp cloth and a small amount of mild soap. The BOOST midsole can be cleaned effectively with a soft brush (like an old toothbrush) and soapy water to remove scuffs and grime. Avoid using harsh chemicals, abrasive cleaners, or machine washing, as these can damage the materials and integrity of the shoe. Always air dry your sneakers away from direct sunlight or heat sources to prevent material degradation.