The tongue is made of breathable mesh material, which achieves good air permeability and effectively dissipates heat during exercise. The tongue is made of elastic material to achieve good wrapping and prevent injuries. Fix the shoelaces and tongue to reduce damage to the feet when sliding sideways. Suitable for users with rounded feet. It provides comfortable and comfortable space on the inside and outside of the toes, and reduces the height of the top of the instep and the width of the ankle joints, bringing a comfortable and stable fit.