GRACE HILL has obtained Gore license since 2010, and we strictly follow up with the guidelines during development & production stage.Researching and applying the best waterproof technology, using techniques such as seam sealing, laser cutting, high-frequency machine sealing, and ultrasonic sewing. Implementation of training on the inbound material quality checking, Metal-free policy executing, Suter testing, seam slippage testing are well scheduled. To provide customers with the highest quality products.