Spira Men's Azimuth Hiking Boots Leather Tri-WaveSpring returns energy with every step for cushioning and shock absorption. Multi-density EVA midsole offers lightweight cushioning. Dual-density EVA insole features an air flow system that allows dispersed air from the spring chambers to vent into shoe for a cool, comfortable foot environment. Water-resistant full-grain leather upper, air mesh upper lining, molded contoured EVA insole, EVA midsole, injected polyurethane shank, rubber outsole. Care: Buff with a leather cleaner or polish.