It is leather and it is lined, just like they say it is. It’s also reasonable heavy. It should hold together during use.
The price is also very nice.
However, I found the jerkin to fit very large even though I checked the sizing guide before purchasing/ordering. The leather straps on the front do not allow for much adjustment, so if the sizing is off, is going to be off. They also do not like to lay flat, as mentioned in other reviews. When making you decision to buy this item (or not) it is worth bearing in mind that the models are used in the photos are, well, models. The jerkin might not look as nice on a big boned middle aged frame as it does on a handsome young model. This is where the limited sizing adjustments can become a nit to pick.
So, if you're a young model it will look much like the photo when you put it on, and that will be great. If you're a middle aged not-model dude, it might look more like a leather tube when you put it on. A great item when expectations are appropriate. Mine were not, but at least the return policy is fair!