whoa nelly - you are looking at 2 different products and it looks like someone from Sierra Trading post actually made the big goof on the second one (note that it is not actually available for purchase). If you look on another site selling the same long johns, they don't actually contain any wool (they are cotton poly) and they are not that expensive in the first place $14.99 on sale (from $20) at a ski web store.
Not that I'm going to defend products from China - we take advantage of them to get cheap stuff and they take advantage of us by selling us crap..... (and the workers are the ones that suffer the most) but this one looks like a data entry error.