- Size: 37 • Ultra-lightweight and breathable mesh upper that offers excellent flexibility and comfort. • Elastic latex insole with honeycomb design for good flexibility and a barefoot feel. • Thick, non-slip rubber sole that provides good grip and protects feet from stones. • Flat heel with three-dimensional grooves and 8 drainage holes to remove gravel and water. • Dual-function buckle closure and rubber sole at the heel for quick and comfortable adjustment.