overnight mail envelope

overnight mail envelope refers to an envelope used for sending documents or packages via overnight mail services. USPS, FedEx, and UPS offer specialized envelopes and packaging for overnight delivery, ensuring faster transit times. The cost of overnight mail will vary based on the weight, size, and destination of the envelope. USPS offers Priority Mail Express for overnight delivery, while UPS and FedEx provide similar services like Next Day Air and Overnight Express.