What is the sheet warranty? Melissa July 18, 2018 15:35 Updated The Endy Sheets are backed by a 1-year warranty against manufacturing defects. Click here to read the complete warranty terms in full detail. Related articles How deep are Endy fitted sheets? Can I purchase just a flat sheet? I have a king bed but I use standard pillows. How can I get standard sized pillowcases? Where can I try the Endy Mattress? Is the mattress protector noisy?