It's very comfortable.

INSTOCK SG-No.1 Japan Futon (Ergonomic):[01] Tatami Mattress (Thick Approx 13cm ~16cm) | Size:120*200 (Super Single) | Color:Stone Navy(+S$19) | 1.Cotton mattress cover (L-double-zip)::none | 2.Cotton mattress cover (L-double-zip)::none | FREE GIFT:GIFT-2