The Wellness Shower Filter converts toxic fluoride to a safer form of calcium fluoride in addition to removing chlorine and other toxins.  I found several CureZone Posts that confirm that calcium 'neutralizes' or reduces the toxicity of fluoride (thanks Grzbear!):

http://www.curezone.com/forums/am.asp?i=1100227

http://www.curezone.com/forums/am.asp?i=1096264

From the Wellness Filter Fact Book…

The Wellness Filter®’s

unique purification system will remove the trace radioactive

and heavy metal contaminants contained in the

hydrofluorosilicic acid. It also reacts with the

hydrofluorosilicic acid to produce calcium fluoride – a

naturally occurring form of fluoride found in mineral

springs. Unlike the other forms of fluoride, calcium fluoride

is non-toxic, is not retained in the body and is completely

excreted in the urine27. For those concerned about stopping

the absorption of fluoride through the skin in the

shower/bath (a generally impractical use of distillation and

R/O), the Wellness Filter® is also available in both a shower

system and a whole house unit.

27 Kick CH, Bethke RM, Edgington BH, Wilder OHM, Record

PR, Wilder W, Hill TJ, Chase SW - ``Fluorine in Animal

Nutrition" Bulletin 558, US Agricultural Experiment Station,

Wooster, Ohio (1935)

Reference: http://thewaterkey.com/pdf/wellnessfilterfactbook.pdf

Here are several websites where the Wellness Filter can be purchased:

http://www.wellnessshower.com/

http://www.wellnessfilter.com/Products/Shower.aspx

 http://www.promolife.com/bed-and-bath/shower-and-bath-filters/wellness-shower...

We have the Wellness Shower Filter and absolutely love it!  I haven't noticed that it has reduced the water pressure at all.  It has a backflow feature that allows you to periodically flush the filter, which gives it a longer life than most filters...up to 2 years.  So when you consider that you can use it for 2 years, it makes it less expensive than most of the other 'top of the line' filters.