For the most part, these gloves etc... are not much more than wrist braces that one would use if suffering from Carpal Tunnel. Any Walmart or CVS or Walgreens will have these same type braces. I have one for each hand due to my own carpal tunnel issues that I've had and have used these to re-train my wrist to stay straight while shooting. They keep the wrist in a neutral and straight position, same as what you would want when shooting. They usually cost less than a dedicated 'pool' accessory. An example ...
http://www.amazon.com/Mueller-Fitted...tunnel+support
HTH,
Dave.