Futon mattresses are usually heavy and difficult to move alone. In this example I’ve used a futon that’s 140*200 cm. Here’s how you can roll up your futon alone:
(1) Buy two cargo straps and place them next to your futon where you can reach them when you’ve finished rolling up the futon.
(2) Fold the mattress once.
(3) Start rolling the futon. Use your knee to prevent the futon from unfolding.
(4) Place the cargo straps around the futon.
(6) Now you can move the futon alone, by carrying it from the cargo straps.