Made for wintertime fun, the Muck Boots® Kids' Element waterproof winter boots offer warm and cozy comfort even in temps that dip into the negative digits. These neoprene and rubber snow boots feature a soft fleece lining for softness and warmth that lasts all season. WEATHER-READY PERFORMANCE: Waterproof construction DESIGN: 5mm neoprene bootie for comfortable, flexible performance IN-SHOE COMFORT: Soft fleece lining for added warmth Comfortable EVA insole DURABILITY & TRACTION: Rubber cup outsole ADDITIONAL DETAILS: Comfort rating: -20°F to 50°F Shaft circumference: 13'' Boot height: 10''