I dunno what it means. But I can do my linen neat enough it stays in place at night. days, I don't bother with it. Wife sometimes does, not often. Sometimes we have some cover sheet over the bed. After wash, we just kinda fold and roll them and toss in the closet.
Dee
"When life's a biatch, be a horny dog"
Amps: Marshall JVM 410H w/ Plexi Cap mod, Choke Mod & Negative Feedback Removal mod, 4x12", Behringer GMX110, Amplitube 3/StealthPedal
Half a dozen custom built/bastardized guitars all with EMG's, mostly 85's, Ibanez Artwood acoustic & Yamaha SGR bass, Epiphone Prophecy SG, Vox Wah, Pitchblack tuner plus assorted pedals, rack gear etc. for home studio use.