Master Spas Challenger 18 Swim Spa Replacement Cover | Swim Spa Covers

Custom fit for Master Spas Challenger 18D Swim Spa (215" x 94" replacement cover – available in two bi-fold or sectional configurations) High-density foam insulation (1.5 lb density) for superior heat retention and improved energy efficiency Available in marine-grade vinyl or Atlantis Pro-Tex performance fabric for long-lasting durability and weather resistance Reinforced hinge seal for added strength and extended cover life Heat-sealed vapor barriers to help prevent moisture absorption and foam saturation Chemical-resistant liner for improved durability and protection against spa chemicals Durable reinforced handles for easy lifting and cover removal Adjustable locking safety straps that meet ASTM safety standards, including all required mounting hardware for easy installation Optional upgrades available for enhanced durability, insulation, and customization Need a different shape/size? customize cover here! Have additional questions? 1-844-799-0071