DickiesMens Multi-pack Dri-tech 3.0 Moisture Control Heel-lock Crew Socks Casual Sock (pack of 6)

Are these made in the USA?

Why is this listed under "made in usa products only".

Do they come Size 13?

I only received 5 pairs of socks instead of 6. The package is already ripped open... how do I get another pair sent?