Magnum Viper Pro 8.0 Side-Zip Boots Leather M-P.A.C.T Insole - Provides exceptional comfort. Cambrelle Lining - Featuring moisture wicking technology to ensure your feet stay cool, dry and comfortable. Padded Collar - Enhanced support and additional comfort. Side Zip - Ensures a fast and easy on/off. TPU Reinforced Toe-Box - Along with a heel counter and foam ankle roll provide added protection.