Puma's Shintai was designed to work under a variety of circumstances. By making the shoe lightweight and flexible, the shoe can be easily packed or carried, making it an ideal travel choice. The laces extend extra-wide so you can form the shoe nicely to your foot, making it wide or narrow. The upper portion of the shoe is made of mesh material for breatheability and comfort. The EVA rubber sole is deeply grooved throughout, making it flexible enough to bend.