[nickcrowhurst]

I had a sailmaker produce some curved window insulators and protectors. They are made of two layers of heavy duty canvas as used in boat canopies, with half inch thick heavy foam between the layers. They are fitted when required with stainless steel "lift-a-dot" fasteners. They make a great difference to comfort on cold evenings, and protect the windows when travelling. We are very pleased with them. The tricky part was producing a 3-dimensional paper template to give to the sailmaker.
Nick.