Santorini Premium Pulley Umbrella is a Commercial grade outdoor umbrella. Suitable for outdoor commercial use and leisure environments such as seaside, square, hotel, patio, etc.This commercial grade umbrella has two kinds of frames of different materials to choose from.One is Marine Grade Anodised Aluminium rib,the other is super durable heavy huty 13mm fiberglass rod.Both of them are STRONG AND DURABLE. Santorini uses the finest solution-dyed acrylic canvas manufactured by S.A. Recasens in Spain.It has the best available colour fastness rating of 7-8 out of 8. It also has the highest possible UV protection rating of UPF 80 according to European standards.We also use 900D polyester fabric to satisfy our customers'demand for UV digital color printing.