comments:
Suckerforcats posted on r/bedding1w
You might need something like what they use with hospital or ambulance mattresses but I'm not sure if you could even find something like that for a regular mattress. What if you tried a different fabric? Real linen is a bit of a different texture than your basic sheet. I have Simple Opulence linen sheets from Amazon that I love. Or satin. I did just find a vinyl sheet but they don't have the size you need Here