Fastening with two buckles with a pin that allows for individual adjustment. - The original BIRKENSTOCK insole, thanks to its special shaping, provides the feet with the highest level of comfort for many hours. - The suede insole is comfortable for the foot and prevents chafing, abrasions and unpleasant odors. - The foam sole provides a feeling of greater softness and additional cushioning. - The length of the insert is: 26.5 cm.