Weight per pair: 4.50 lbs100% waterproof CR-Foam bootie constructionBreathable Airmesh liningRemovable 6mm Nitracel EVA sock linerNatural rubber upper overlaysHands free easy on / easy offEasy clean upFleece liningStretch-fit topline binding snugs calf to keep warmth in and cold out5mm CR flex-foam bootie with four-way stretch nylon100% waterprooflightweight and flexibleMS-1 molded outsole is rugged, aggressive and durable for maximum protection and stabilityAdditional Achilles overlay for added protection2mm thermal foam underlay added to the instep area for additional warmthEVA molded midsole with contoured footbed (internal)Reinforced toeAdded toe protection with a wrap-up bumperComfort range of -40 Degrees F to 60 Degrees F