Do I need to keep the box to return my Endy? Melissa July 19, 2018 15:11 Updated You do not need to keep the original packaging the mattress was shipped in. Please contact us at firstname.lastname@example.org and we will coordinate your return for you. Related articles What happens to the mattress when it’s returned? What is your exchange policy? How do I return my Endy? Are there any re-stocking fees? Can you explain Endy's 100 Night mattress trial?