The Alphaburly® Pro is focused on a personalized fit and guaranteed comfort. Constructed with a more-natural rubber compound and a new full-length zipper this boot is much more flexible and much 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 dry and comfortable while the adjustable neoprene gusset increases stability and accommodates varying calf sizes.