Light weight, breathable, great nonslip traction and very comfortable! I had already owned an older version of this same shoe (3 yrs old). This pair fits better because of a shoe construction improvement and also has better traction. What has changed is the material and attachment structure for the tongue. The stretchy material in the old pair that attached the tongue would bunch up, causing ripples and ridges in the instep of the shoe. Pulling on the tongue would straighten these out, but then they would reappear while wearing the shoe causing foot pain. Eventually, the ripples and ridges became a permanent part of the shoe. With the new design that doesn't happen. The tread design on the bottom of the sole has also been changed to allow for better nonslip traction. A vast improvement on both counts over my old pair!