S547Ultrasonic Heated Tunnel JacketThe Ultrasonic Heated Tunnel Jacket offers the best ininsulation solutions. Carbon fi bre heated panels are embeddedinto this padded jacket to bring extra warmth and comfort tothe wearer. The use of innovative heat sealed baffl e fabricincreases its water resistance. The S547 also has three heatsettings controlled by a button at the chest and includes arechargeable battery that offers 3-10 hours of heat