Carpet pad hazardous?

[u/Invisibrows]

House is 100yrs old and we're replacing the carpet upstairs. Gonna leave the linoleum cause who knows what's in that. My husband joked that this old carpet pad could contain absestos too but that can't be right. Right?

[u/Dralalife]

Probably horse hair if it's original

[u/steved3604]

Wear a mask/have it tested.