Asolo’s classic backpacking boot gets an upgrade. A new TPS sole designed in collaboration with Vibram enhances the Triple Power Structure technology that makes this boot a reliable favorite. A dual-density PU midsole is injected directly onto the rubber outsole to make a single element sole that will withstand even the toughest treks for years to come.. . Heavy-duty, water-resistant, full-grain leather upper with Gore-Tex lining guarantees waterproof and breathable protection from the elements. TPS high- and low-density polyurethane midsole incorporates three shock absorbers to improve comfort under areas of the foot that receive high impact during activity. Women-specific last designed to best fit women’s anatomical foot shape for long-lasting comfort and support. Asolo/Vibram rubber outsole has a strong, versatile grip. Asoflex shank provides underfoot stability. Ideal for hiking with a heavy pack over uneven ground.