Durable is the word I’d use to describe the polycarbonate. Satisfactory materials, they've met my initial expectations. The quality of the polycarbonate panels seems acceptable, serving its purpose well. It’s lightweight but strong, thanks to the aluminum. Materials like aluminum and polycarbonate have been used, both meeting my expectations. Standard quality materials used here, nothing less. The feel of the aluminum frame seems decent, adding to the overall build quality. The aluminum frame lends a sturdy feel to the entire structure. Polycarbonate does a good job in UV protection.