You can return your mattress or bed base order within 100 days of receiving it if you're unhappy, thanks to the Cocoon by Sealy 100-night trial. Cocoon by Sealy requests that you test out your mattress for at least 30 days before you issue a return. Returns are free and you’ll receive a full refund once your order has been returned. To start a return, head to the Cocoon by Sealy support page and fill out a returns form.