Ultraswim shampoo, $5.45 for 7 ounces. It is sold with some glowing descriptions: ". . . a unique, patented formula that actually removes chlorine from hair, transforming swimmer’s hair into salon-beautiful hair. In recent independent lab tests, ULTRASWIM removed at least twice as much chlorine from hair as other swimmer shampoos, and almost four times as much chlorine as popular everyday shampoos. "
Let me preface my comments by saying I have thick, coarse, long, damaged hair. I don't know how this product works on other hair types. BUT - I found no discernible difference in the condition of my hair after using this shampoo and a regular better-quality shampoo (NOT the cheap stuff in the dispensers at the health club). I didn't notice any results that made this product worth it. I'll probably just refill the bottle with my normal shampoo from home, and continue to use a good-quality conditioner after swimming. I also don't know if this shampoo may help lessen the effects of cumulative damage on hair over many weeks - but after just a couple of washings with it, I didn't see any change in my hair. I won't buy it again.
What has helped reduce my hair damage has been getting a better-quality swim cap. I bought this "Long hair silicone cap" ($8.95) and I'm very pleased with it. It's large enough to fit around my huge head plus my bulky braid. It's very smooth and slippery in texture so it comes off without pulling my hair, and keeps my hair from getting all tangled while doing my laps. It also prevents my hair from getting tangled by the strap of my swim goggles.
The only drawback is that it does tend to slip off a bit and I have to adjust it periodically, so I probably wouldn't use it in an open-water swim. Actually, one other drawback is that the one I purchased is silver in color, so it looks like I'm swimming with a tinfoil hat.
I'm a convert, though, and from now on I'll be using this type of swim cap religiously in the pool, even though our pool rules do not require swim cap wear.