Waterproof: Use in all weather conditions Superior Fabrics: 3 layer outer polyester protection Inner layer of polar fleece for Comfort and insulation Pocket:Easily accessible pocket for storage Dual Port USB Powerbank: Heat vest and charge smartphone at the same time!! 📱 Reflectors: Reflectors for safe night time walking. Medium Length 21.5" Width: 18" Black and Orange BATTERY: Long lasting up to 6 Hours Voltage: 5V Power: 5000 MAH Charging Time: 4 Hours TEMPERATURE: Low: 100F Medium: 110F High: 120F