Little ones can keep their hands warm on extra cold days with the state of the art technology of the Glade Mittens. Thermal RTM insulation uses multi channel and hollow fibers to provide maximum warmth, while breathable and waterproof MemBrainAR technology keeps little fingers dry. 100% nylon 4.8 oz. and 6.8 oz.. Thermal RTM 150 insulation. DriClimeAR lining wicks moisture. Polyurethane 0.7mm reinforcement. MemBrainAR Mitt insert is windproof and breathable. Heater pocket. 10,000mm JIS L 1092 waterproof rating. 10,000gm JIGS 1099 B1 breathability rating. Hohenstein RET: 6 to 8.