chaise lounge for sleeping?

We have my elderly mother sleeping in her power recliner chair now, since swinging her legs up into a bed has proved too difficult. You can buy special mattresses for recliners, but the home health care store told us to just get one of those eggcrate foam mattress toppers which we then covered with a mattress pad and sheet. She doesn’t ever roll over when she sleeps (hadn’t for years, since the arthritis started making moving difficult) so she says it is pretty comfy. My sister also sleeps most of the time in a recliner because of her back problems.