Do I need special FedEx envelopes/boxes when shipping books with FedEx?

Hi, I have to ship a book through FedEx tomorrow which was sold through eBay. Normally, I purchase a supply of thick envelopes and use that to ship books through usps media mail but I'm not sure if I can do the same with FedEx. Can I use my own envelopes with a FedEx shipping label? Alternatively, do I just... show more Hi, I have to ship a book through FedEx tomorrow which was sold through eBay. Normally, I purchase a supply of thick envelopes and use that to ship books through usps media mail but I'm not sure if I can do the same with FedEx. Can I use my own envelopes with a FedEx shipping label?

Alternatively, do I just take my book and shipping label to FedEx and let them take care of packing everything with their own supply of boxes/envelopes?
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