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At a distance of 3000 miles (from my home in Cambridge MA, USA) it's not too conveniently located, but I highly recommend the McRoskey Airflex Mattress Company of San Francisco CA, USA, purveyors of fine bedding.
At 6'6" tall, I yearned for a bed where I could stretch out and not have my feet hanging off the end. A McRoskey bed was the solution. They'll make a mattress and box spring of any size (or shape) desired. Mine is a standard queen size plus 10" of extra length over my height (60" X 88").
The quality of this mattress is fantastic. I bought mine after sleeping on one in a Bed and Breakfast while on vacation in California (1983). The mattress I slept on that night was 60+ years old and stuffed with horse hair! McRoskey guarantees their work for 20 years and with a little care the mattress and box spring should easily last twice that long. Unless my house burns down, I hope to have my bed for life. (The complete story of how I ended up in the McRoskey showroom and bough...