Design: Seam-sealed waterproof protection Combination of waterproof leather and water-resistant flannel/knit quilted upper ISA TanTec's LITE(TM) eco-friendly leather HEAT-MX(TM) 90 thermal insulation keeps the feet warm Odor-eliminating, natural and non-toxic Cleansport NXT(TM) treatment In-Shoe Comfort: Moisture wicking fleece lining allows for comfortable all-day wear Removable CushyStep Everyday EVA foam footbed Durability & Traction: DOVER outsole with deep, self-cleaning treads for stability in snowy conditions Waterproof and recyclable lightweight synthetic RubberHe shell Shell portion made with sustainable BLOOM(TM) STRIDE synthetic rubber Proprietary technology offers traction and increased flexibility Additional Details: Comfortable down to -4degF Height: 7.67 in Weight: 2.05 lbs per pair Circumference: 10.63 in (size 7) Made in USA with foreign and Canadian components Leather is from a tannery rated gold for its water, energy, and waste management practices