Adapt and succeed. To be successful in the field, you gotta be flexible. Out in the wild, adapting to the ever-changing demands of your environment is key to success. And in order to do that, you need a boot that can adapt with you. The Alphaburly Pro is focused on personalized fit and guaranteed comfort, no matter who you are or what situation you find yourself in. That adaptability is due in large part to a more natural rubber compound, full-length side-zipper and an adjustable neoprene gusset. These key features allow for increased flexibility to fit varying calf sizes, easier on / off, and improved stability to take on challenging terrain as it comes. Rated for temps 32 degree F to -60 degree F, Alphaburly Pro 1,000-gram Insulated Hunting Boots will take on the coldest conditions as they come, too, with an embossed, naturally-insulating neoprene liner providing good air circulation to keep legs and feet from over-heating. High quality, scent-free rubber combined with naturally insulating neoprene... for an extremely durable, lightweight and comfortable boot; Thick cushioning EVA midsole offers extra comfort and shock absorption; 1,000-gram Thinsulate Ultra Insulation keeps your mind off cold feet; Adjustable side gusset allows for a customizable fit; Narrowed ankle pocket grips the top of the foot better and locks the heel in place, preventing excess rubbing and chafing; The non-loading Burly Pro outsole provides terrific traction in all hunting conditions; Supportive fiberglass shank; 18" height 41 oz. each.; Rated for temperatures from 32 to -60 F; Insulation: 1,000-gram Thinsulate Ultra; Temp. Rating: 32 to -60 F; Measure: 18"h.; Weigh: 41 oz. each; Mfg. Number: 376017.