Items not eligible for return are sale items marked as "Final Sale", washed/worn apparel, paper goods, drinkware, home goods, other non-apparel items, and "Mystery" promotional items. A $7 fee for the return shipping label will be deducted from your refund.
All you need is your order number and the email you made the purchase with. You can find your order number under My Account > My Orders or in your confirmation email.