Blackhawk! is expanding its successful boot line for 2008 with the Side-Zip waterproof boot in 5- or 7-inch height. The Blackhawk! ZW5 and ZW7 are built on a Vibram "Multisport" oil-resistant TC4+ compound outer sole with large, open lugs for excellent traction over debris or irregular surfaces. The Side-Zip boots also feature a long-wearing, water-friendly PU mid-sole. The Cordura and full-grain leather upper have a waterproof SympaTex barrier and gusseted tongue with a durable easy-to use molded tooth zipper opening on the side. Although waterproof, the ZW5 and ZW7 allow the foot to breathe with an Ortholite custom-molded foot bed that is both washable and anti-microbial. A Dri-Lex inner lining wicks away any moisture and dries quickly to maintain maximum comfort.