So I bought this for my brand new mattress, it somehow managed to gather all these hard little fabric balls from my sheets and u can feel them thro the sheets now so i got this and statted to basically shave my sheets and it looks so great so far it'll take alot of time to do the whole thing but the area I got done so far looks and feels so amazing it was exactly what I needed to go backntona more comftorable night sleep on my new bed.