Brittle filament

[KevinHowJones]

I purchased new filament: https://www.amazon.com/gp/product/B01EKEMUEK

I used it once, and observed that it created a hard glossy finish, unlike the filament I had been using before. I actually kind of liked the result. However, I observed right after a print, the filament was "cracked" about 5 inches above the extruder. When I tried to straighten it out, it broke right off. So then I started breaking off little pieces, by bending them back and forth 2 or 3 times, and realized the filament seems "brittle".

Is this normal for some filaments? In retrospect, I just re-read the advertisement on the Amazon page, and it says it is "Vacuum sealed in desiccant." I now remember when opening the package that while it was sealed, the package was not tight around the contents, like when something is vacuum sealed.

If this is "bad" or deteriorated, I still have a couple of days to return it.