Designed for athletic hunters and outdoor enthusiasts of all types to move fast and with confidence on tough terrain. Apex is built with an innovative construction for high-endurance treks that require a more athletic and agile boot while still providing comfort and waterproof protection. 100% waterproof construction coupled with breathable mesh linings to provide elite protection and moisture management. Surprisingly light-weight performance for great all-day comfort and fit. Equally at home on loose rocky terrain, cold/wet ground and of course, the MUCK. - 100% Waterproof - 5mm CR Flex-Foam neoprene liner is 100% waterproof with exceptional comfort, flexibility, shock absorption and heat retention properties; adjusts to the contours of your foot to resist blisters and chafing - Lock-down zipper closure system, with a waterproof zipper, the industry's finest and most durable technical zipper construction - Velcro stretch collar for custom fit - Scree collar to keep out debris and prevents chafing - Breathable mesh lining facilitates air circulation to improve comfort and reduce heat and moisture - Dual density comfort footbed with memory foam for long lasting cushioning - EVA midsole for lightweight comfort and shock absorption - Lugged rubber outsole for durable traction - bioDEWIX™ antimicrobial footbed insert topcover with NZYM™ for odor control and moisture management - Pull-tab for easy on and off - Our lightest outdoor/hunting boot - Weight 2. 65 lbs size 9 - Estimated height: 20cm/ 7. 9in - Estimated max calf circumference: 25cm/ 9. 8in - Comfort Range: Sub Freezing to 65°F / 18°C