At my busy massage office
NRG Deluxe Massage Sheet Set Flannel
I go through sheets quickly, usually a set of flannel sheets just lasts 2 seasons; I don't use them in the hot summer months. I still have a few from 3 years ago, but the hems fray with washing and constant usage and are really not recommended for clients anymore. I keep them for "messy" jobs like hot stone massage.