Swanndri uses a 100 year old process to make the wool water proof, The shirt, isn't a shirt like your use too, it's quite thick and long, goes about midway down the thigh, and you wouldn't tuck it into your pants. It's made this long so as to enable the wearer to sit down in mud and muck if the need should arise while hunting, and not get wet.
They use to be made in New Zealand, but like many things today, the wool is still made and treated in New Zealand, but it's now made into a garment in China and shipped back to New Zealand.
Both my shirt and jacket were the originals made in New Zealand, now if you want originals, you have to shop around.