Hoka One One Kaha 3 GTX is a mid-cut trekking boot designed for long day hikes and multi-day adventures, combining GORE‑TEX waterproofing with a cushioned dual-density midsole for comfort and grip on varied terrain. Key attributes: Green | Nubuck leather | GORE-TEX waterproof membrane | Vibram Megagrip outsole for traction | Dual-density EVA midsole for cushioning | MetaRocker geometry for stable roll-through | Quick-lace metal top hooks | Cushioned PU sockliner | Molded TPU heel counter and toe cap | Padded Achilles-friendly collar | Mid-cut hiking boot silhouette | Durable toe cap | Hubble® Heel and SwallowTail™ design | Integrated flex grooves | Dimensions & fit: Size recommendation: size up by half a size. | Composition & care: Nubuck leather | GORE-TEX membrane | EVA midsole | PU sockliner | Polyester mesh (upper/lining) | Vibram rubber outsole | Wipe clean with a damp cloth. Use nubuck leather cleaner/conditioner as needed. Do not machine wash. Air dry away from direct heat.