jg wrote an answer about Eureka Alpenlite 2XT Tent: 2-Person 4-Season on June 5, 2010
no, a tent and fly toegether = tent and fly and not double wall. a true double wall has 2 layers of fabric sewn together at the edges at a min. sort of like a sleeping bag has an inner and outer shell. adding a fly means that you now have a tent with a fly.