I would love to purchase a set of Belgian flax linen bedding from West Elm (sheets, duvet cover), but on sale they’re $370, so I have a budget pick from IKEA. Also, an alternative to the platform bed frame would be this futon bifold frame from the same manufacturer.
It may soon be time to replace my mattress (7 years), and I may take the opportunity to get rid of the frame and downsize slightly. While reading Goodbye, Things, I discovered shikibuton, a traditional Japanese cotton mattress pad about 3 inches thick. Normally they’re placed on a tatami mat on the floor, but I will probably opt for a hardwood folding platform. So far, my replacement set is looking something like this ($475 for the items pictured):