Adding the Rush Processing option guarantees that your order will ship out that same day if placed before 12pm PST. Orders placed after 12pm PST or on Saturdays/Sundays/Holidays will process the following business day. Rush Processing will bypass our standard 2-4 business day processing time and your order will be shipped out that same business day (if placed before 12pm PST Mon-Fri).*Rush Processing is not always available.*