Hylaea Unisex Non Slip Socks with Grip for Yoga, Hospital, Pilates, Barre | Ankle, Cushioned

Where are these made?

mine reeked to high heaven of perfume. i got a warehouse deal (damaged packaging). do they usually not have a scent?

How much percent of cotton is this?

What tempurature to wash these socks in? Machine or hand wash.