Will I be charged for the mattress topper if I return my Helix? January 29, 2021 19:04 Nope! The mattress topper is completely free, regardless of how you decide to proceed with your Helix mattress. Related articles If I return my mattress, do I also return the topper? What is the Helix Mattress Topper program? Who is eligible for a complimentary mattress topper? Do I need to keep the box to return my mattress? Can I wash my complimentary topper?