Our most lightly insulated winter boot, built for all-weather protection and exceptional comfort all day long We used an industry-first 60 grams of PrimaLoft® insulation - not too hot, but just warm enough for comfort indoors and out. They'll keep your feet warm outside when the temperatures drop, but they'll also stay comfortable when you head back in. Size 9M Never worn, however my daughter took the insoles out so they will need new ones