I have bought these for our community over the last ? Years, & we rent them around the pool in the summer. They are durable enough, but need a mattress for comfort.
We have them on our own roof, & given normal domestic use should last 4-5 years.
There are more expensive better quality ones around, but given the effects of exposure to sun (where can you store them?), I feel they're as good as any.
SIG. Wo Fat Chow (Import & Export)