I‘ve heard reports [0] that Polartec NeoShell is not very durable. After a few months of light usage, apparently the fabric develops cracks at the shoulders and wrists.
My NeoShell items have 1-3 years of usage on them, without any cracks. This looks like a single comment - more likely to be an issue with that particular manufacturer or product.
[0] https://www.bergfreunde.de/basislager/polartec-neoshell-das-...