A futon is a Japanese padded mattress that can be rolled up for portable uses much like a sleeping bag.
Organic futons cost about as much as any midrange futon. The nicer the materials, the more plush, the more it will cost just like any other futon. You can buy a full size futon mattress from Northern Naturals for just under $500.
Weight will vary depending whether you are looking for a 3ft single, or 4ft6 double. Some futon retailers use bits of offcut foam and these weigh less. EG - Futon mattresses from Comfy Living are stuffed with 4 layers of fillings (felt & wool) so are quite heavy, for a standard 4ft6 double size, the weight is around 12kg. The luxury thick mattresses 14cm thick obviously weigh more.
112lbs
it can hold as much weight as it can handle
A Command Strip can typically hold up to 7.5 pounds of weight.
it can hold up to 2 gallons
Paper can hold exactly 4.5 kg
Gorilla Super Glue can hold up to 30 pounds of weight.
The Golden Gate Bridge can hold up to 38,000 tons of weight.
90lbs
120 pounds