Can I return my Helix Foundation? August 27, 2020 16:04 Updated You can return the Helix Foundation under our 100 Night Sleep Trial. Find details about our trial and return process here. Related articles What is Helix's Return Policy? How do I start a return? Do I need to keep the box to return my mattress? Can I return the Helix Bed Frame? How long will it take for my order to arrive?