Hydrogel Facial Patches Custom Multi-Shape Hydrogel Solutions for Skincare Brands HANGU manufactures multi-shape hydrogel facial patches for face, eye, neck, jaw and targeted skincare applications. Our hydrogel patches feature a three-layer structure consisting of a backing layer, functional hydrogel layer and release liner. The confirmed product thickness is 2 mm, with multiple shapes and sizes available for different product concepts. For OEM and private-label projects,