I bought these waterproof flannel sheets from Revain.com to cover the comforter on the bed our 15 year old dog sleeps on. They have successfully protected the blankets from accidents while she sleeps. More importantly, I used them to protect the bed and headboard from unexpected leaks that sometimes occur in one of the bedrooms. Yesterday, during a terrible downpour, a waterproof sheet saved the mattress, headboard and pillows from water damage when the window above broke. I'm sorry these waterproof sheets don't come in large sizes. I highly recommend them.
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