This improved protection against liquids and scratches can be attributed to the smooth and apparently waterproof coating. However, this construction has two disadvantages. First, the coating does not extend all the way to the edge of the back, so liquid can penetrate and leave permanent stains where the fabric meets the plastic frame. Second, this coating can wear down over time.
iFixit intentionally damaged the coating with a knife during testing, which was enough to leave permanent coffee stains on the case. Because these stains are largely underneath the coating, cleaning the case afterward is impossible. iFixit believes that TechWoven cases will last much longer than Apple’s FineWoven cases, but the expensive $59 accessories also feel like slippery plastic due to the coating, and they are still not as durable as silicone cases.
