The Premium Shield features on the luxurious Signature range. This combines five different types of insulation to retain the heat within the cabinet by the Superior Heatlock Insulation, which includes:

• The base has a reflective foil wrap
• The cabinet has thick foil coated insulation panels fitting into it
• The shell has several layers of ultra-efficient spray foam
• The hot tub has an additional 360-degree wall of reflective foil wrapped around the steel structure locking in heat
• And the hot tub has a well-insulated cover