Back-order items are sold out products in high demand that are being re-stocked. To ensure that you get a hold of these items, just add to your cart and your purchased orders will be delivered to you upon availability.
If you have back-order item(s) in your order, the whole order in your cart including items which are available will be placed on hold and shipped altogether when the back-order item(s) are back in stock. (in this instance, arrival timeframe will usually be 3 to 4 weeks).
If you require more information, feel free to email us at email@example.com