Yes, it's for prevention of breakage, and cleanliness. Keeps it from getting tangled and pulled out. Also, if you have a horse with a very long tail, they always keep it braided and bagged because the horses will step on it if they back up... it's kinda funny, but annoying and painful, because they end up pulling thier tail out. It is funny to see them wonder why their butt is getting pulled on, I must say xD
I had more breakage while braiding ,than I did when it was down . BUT I was also using a crappy detangler and conditioner (sp?) . It was Mane and Tail or Mane N Tail (something like that) .It left the mane and tail feeling gross and dull .
I'm going to try Mane-ly Long ,as my horses have thick long crazy hair . Reveiws say that it leaves the hair soft and silky , no funny residue ,and TANGLE FREE! (My qh mare gets tangles very easily .)