Spa covers of thick rigid foam gradually get waterlogged and cave in, like mine did. So when I saw an ad for an innovative design at SpaCap.com, I got interested. The Spa Cap is essentially a large air bladder enclosed in a couple of layers of heavy-duty marine vinyl, so it sounds like a promising product. It is not. Its insulation qualities are close to nil, and worse, the company's got the worst customer service this side of Attila the Hun. I bought a Spa Cap, and after watching the company's online instructional video... read full review »