Once your order leaves our warehouse, the Shipping Method you select determines how quickly the order will arrive to your doorstep. If your shipping address is a PO Box or an APO/FPO address, your order will be shipped via the US Postal Service.  Remember that our warehouse requires 3-5 business days for order processing and UPS does NOT count the day it receives shipping information as a "business day". Thus, expect a UPS Next Day shipment to arrive 3 business days after the order was placed. For 2-Day, look for the package after 4 business days. Orders shipped via UPS will not be delivered on Saturday, Sunday, or national holidays.  Note that UPS does not ship to PO Boxes.