These womens cool grey/blue/yellow hi-tec 24004 alchemy lite mid boots have many unique features such as waterproof, suede and high performance mesh uppers, ghilly and double eyelet lacing system creates a secure fit, tpr "heel arm", ensures a secure heel lock, even during the most testing underfoot conditions, moisture-wicking lining keeps the foot dry, contoured cmeva midsole, duable, mdt carbon rubber sandal outsole, ortholite insole delivers long lasting cushioning, anti-odor and anti-microbial pial properties, all of which ensures ultimate all day comfort.