These are comfortable chairs for all sizes of people.  We are short so we added a lumbar back cushion that makes the chair fit us well.  
The aluminum metal frame is sturdy and light. The finish looks like anodized aluminum.  It should hold up for 10 years and probably much more; even in our extremely strong desert sun.  The seat cushion is supported by the same aluminum type structure in a web pattern, unlike the plastic webbing used in some chairs. 
Our former chairs were made from synthetic wicker and much more expensive. It took too much effort to put the cover over the wicker after each use and then take it off to use the wicker chairs.  After a dozen times we stopped using the covers.   That wicker claimed to be tolerant to solar UV, but disintegrated in about 5 years into tiny chips and dust. 
The fabric on the included cushions seems sturdy; but time will tell how it holds up to our very strong sun.