The Men's Kaha 2 Low GTX features: Waterproof nubuck leather GORE-TEX footwear fabric with recycled textile Dual-density compression-molded foam midsole with HUBBLE® heel and SwallowTail™ Late stage Meta-Rocker with integrated flex grooves Vibram® Megagrip rubber with 5mm lugs Traction Lug Quick-lace metal top hooks Abrasion resistant toecap and heel Waterproof membrane bootie construction Recycled content mesh and recycled polyester laces Anatomical Achilles construction with heel pull tab Topi Nubuck Leather, Pull Tab, Gore Tex, Rocker, Heels, Leather