This is a pre-launch promotion they are running. Once you sign up, you get a unique referral link.
*If 5 friends sign up, receive a $15 store credit
*If 10 friends sign up, receive a Premium Cotton Undershirt
*If 25 friends sign up, receive a Odorless Denim Shirt
*If 50 friends sign up, receive a pair of Odorless Raw or Commuter Denim