The Absolute Best Bed: A Japanese Futon | Wirecutter
Amazon.com: FULI Japanese Futon Mattress, 100% Cotton, Foldable & Portable Floor Lounger Bed, Roll Up Sleeping Pad, Shikibuton, Made in Japan (White, Twin) : Everything Else
Futon/Mattress Covers up to 6" thick-WLH B 100% Organic Cotton Twill F | All Organic Home