Maximize your hot tubs efficiency and comfort with our Hot Tub Bubble Liner. Designed to enhance insulation and heat retention, this high-quality liner helps maintain the perfect water temperature, reduces energy consumption, and protects your hot tub from debris. A must-have accessory for every hot tub owner looking to improve spa performance while saving on energy costs. Wave Spas Wave Hot Tub Bubble Liner Thermal Insulation & Protection for Energy-Efficient Spa Care (Square, 4 Person) in Grey