Hey hayley, I got a v pillow from argos for about £7 and didn’t bother with a backrest. First few days of sleeping wasn’t great but I’ve found it a lot better sleeping on the sofa as my bum doesn’t go numb and the high back on it props me up right anyways! I sort of sleep at an angle with my back in the corner of it if that makes sense? But I’m so glad I bought my v pillow 🙂 xx