I laid out the futon before going to sleep.
After getting up in the morning, I fold up the futon and put it in the closet.
round Zen meditation cushion
Specialized and uncommon compared with the everyday bedding sense. In Buddhist or historical contexts it can refer to a round cushion for seated meditation, traditionally made from woven rush or similar plant material.
In Zen contexts, 蒲団 can refer to the round seat used for zazen meditation.
I got sleepy, so I got into bed.
It's cold, so I don't want to get out of bed.
I aired out the futon on a sunny day.
I covered the child with a futon.
I fold up my futon as soon as I get up.
布団 is the concrete futon/bedding material itself, whereas 床 refers more abstractly to the bed or sleeping place, often the spot where the 布団 is laid out.
掛け布団 is specifically the quilt or duvet placed over the sleeper, whereas 布団 more broadly covers the whole bedding set.
布団 is the traditional Japanese bedding laid directly on tatami, while マットレス is a thicker Western-style mattress (or a thin pad placed under a 布団), so learners sometimes use the two interchangeably.
summer bedding; summer futon
thinner futon placed against the skin
waist cushion; cushion worn around the waist for warmth
straw futon; straw mattress; palliasse
waiting wrestler's sitting cushion
gabion; stone-filled cage
drying a futon outside
futon steaming; burying someone under a futon
waiting wrestler's sitting cushion
down quilt; feather futon