The Proline 4–3” Tapered Spa Cover is designed as a universal replacement cover suitable for most makes and models of hot tubs, available in a selection of standard stock sizes. The high-density foam core measures 4 inches at its thickest point and tapers to 3 inches, helping to reduce heat loss while promoting rainwater run-off to minimise surface pooling.Finished in durable brown marine-grade vinyl, the cover is engineered for outdoor performance in all seasons. Reinforced stitching and a strengthened hinge section support long-term durability, helping the cover maintain its shape and insulation performance over time.By reducing heat loss and improving energy efficiency, the Proline cover helps lower running costs while protecting your spa from debris and weather exposure when not in use. It’s a practical and reliable upgrade for hot tub owners looking to maintain performance and extend the life of their investment.