These are super warm, only worn a couple of times. Vulcanized waterproof-rubber upper wards off water and mud, keeping feet completely dry. 100-gram PrimaLoft insulation for extra warmth. Lined with soft Polartec fleece. Stretch elastic gore panel for easy on/off. Comfortable footbed made from sponge rubber and EVA foam covered with woven polyester. Comfortable and supportive EVA midsole. Rubber pull-on loop handles at top of each boot. Adjustable rubber instep strap with metal buckle.