Completely refreshed These LaCrosse Men's Alphaburly Pro Rubber Boots are focused on a personalized fit and guaranteed Comfort. Constructed with a more-natural rubber compound, this boot is much more flexible and easier to get on and off. We've replaced the fleece lining with an embossed neoprene liner for good air circulation to keep legs and feet cool and Comfortable while the adjustable neoprene gusset increases stability and accommodates varying calf sizes.