The jess boot is the newest addition to the ultralite series of boots from Baffin. The ultralite series of boots represents the evolution of winter footwear where comfort meets agility without compromising style or protection. The revolutionary semi rigid foam liner is removable and allows us to get outstanding warmth to weight ratio while keeping the profile of the boot slim and lightweight. Couple the added technology benefits with a classy look, and you get a boot with a winning combination that is sure to provide all day comfort despite the cold. Temperature range of 41 degrees Fahrenheit to minus/negative 58 degrees Fahrenheit.