12 Strong bone and wind resistance Full automatic umbrella 12 BONE STABLE CONSTRUCTION DESIGN TO IMPROVE WIND RESISTANCE Aluminum alloy + glass fiber structure umbrella frame ,Which is more flexible and light weight Built in black glue Not afraid of sun UPF50 No worry about exposure in summer High density impact cloth with strong water repellency Waterproof coating is applied on the umbrella surface for strong water repellency Be particular Build quality High tenacity tailbone - bending without deformation Excellent umbrella bone is an important link of rain resistance and wind resistance without deformation Fine steel paint umbrella rod umbrella rod The upper thick and lower thin inverted rods are used to design the wall thickness Improve firmness and stretch more comfortably The whole umbrella is more stable Anti falling tail bead Integrated umbrella bead, mellow and smooth rain