I agree with Roy on this one (won't wonders cease?). Vitamin C shower filters are excellent for neutralizing chlorine from shower water. I've been using these for 3-4 years--about one filter every year.
Aside from the fact that vitamin C is used ...
There are many filters available for chlorine removal. There are those which have Vitamin C in them which are cheaper and effective. There are also those with KDF technology.
Having used both effectively, choice is yours
Love
Roy