What is the sheet warranty? Melissa 18 July 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 Can I purchase just a flat sheet? How deep are Endy fitted sheets? I have a king bed but I use standard pillows. How can I get standard sized pillowcases? Is the mattress protector noisy? Where can I try the Endy Mattress?