High density, top quality insulating polystyrene, 4" to 2" taper so rainwater runs off. We also offer 5" to 3" & 6" to 4" taper spa covers for even greater insulation and strength.
Non-corrosive, galvanized channel bars add superior strength and prevent warping while keeping weight down. We have not had a single rust failure or complaint in 30 years. Plus, it will not fail, bend or warp like aluminum which is 30% weaker.
Machine heat sealed around the core, this thick polyethylene wrap keeps moisture out of the cores.
26 oz. Marine Grade (best for UV), tough and resilient, is resistant to mildew, abrasion, cracking (-20F), blocking, chlorine and is treated front and back.
Industrial Grade poly-laminate mesh with polyester reinforcement and mildew inhibitors.
Marine Grade polyester thread with rugged reinforced stitching.
Heavy-duty 45 nylon, commercial grade, with aluminum pulls are corrosion resistant and tested to handle one million uses.