['material: made of and tough PVC material, thickness is 0.4mm, high frequency machine voltage welding, tight interface is not easy to leak air, anti-tear and abrasion, high strength, not easy to damage.', 'material: made of and tough PVC material, thickness is 0.4mm, high frequency machine voltage welding, tight interface is not easy to leak air, anti-tear and abrasion, high strength, not easy to damage.', 'material: made of and tough PVC material, thickness is 0.4mm, high frequency machine voltage welding, tight interface is not easy to leak air, anti-tear and abrasion, high strength, not easy to damage.', 'material: made of and tough PVC material, thickness is 0.4mm, high frequency machine voltage welding, tight interface is not easy to leak air, anti-tear and abrasion, high strength, not easy to damage.', 'material: made of and tough PVC material, thickness is 0.4mm, high frequency machine voltage welding, tight interface is not easy to leak air, anti-tear and abrasion, high strength, not easy to damage.']