Super strong and definitely roomy (width and length).  The extendable chair is very comfortable, especially if you suffer from low back pain, reducing strain and stress.  I've actually fallen asleep in this zero gravity chair several times.  I did however add a lounge cushion for extra loft & cushion, thereby increasing overall comfort. Anyone who has sat in this chair found it really comfortable too.  A great design at an affordable price!  I would highly recommend this item.