Foam on hardboard, covered in navy fabric BUT with one end accidently bleached (see photo). This was made as a bed headboard but I used it as a mattress as it was so comfy: 154cm x 60cm x 8cm as well as a sofa topper. Its handy to store it on the top of the sofa (it makes it more comfortable)
Please specify a couple of times when you can collect, I live near the big Tesco in Hove (Church Rd Sackville Rd junction).
Cheers