Designed for comfort in motion and built for backpackings rugged realities, the Aerios AR delivers outstanding support, protection, fit, and freedom. Its 3D-molded Ultralon collar moves with the ankle while bracing and protecting it. It integrates with the tongue, creating a unified piece and a comfortable fit. GORE-TEX provides lasting waterproof, breathable protection, and confidence underfoot comes from an aggressive, mud-shedding lug pattern and the sticky Vibram XS Trek outsole.