The Nike Mercurial X Indoor Soccer Shoes in US size 13 are designed for soccer players looking for high performance on indoor surfaces. The shoes are part of the Nike Anti-Clog product line, which helps prevent mud and dirt from sticking to the outsole. The main color of the shoes is yellow, with a medium width suitable for most foot sizes. With a sleek design and Nike's reputation for quality, these shoes are a great choice for soccer players looking for comfort and durability during indoor matches.